polymorphisms:- polymorphisms is nothing but ability to take more than one forms(One Interface,Multiple Methods or One Name,Many Forms). Encapsulation:- -is nothing but wrapping the data and functions into single entity. Inheritance:- The Process... Read More

Ans: MemoryStream It is a nonbuffered stream whose encapsulated data is directly accessible in memory(RAM not files on disk). Read More

The method or property can be overridden. Read More

an Assembly. Read More

)a nameless global namespace Read More

Ans: Float 32 bit e.g. float i = 6.8F; // or 6.8f By default, a real numeric literal on the right-hand side of the assignment operator is treated as double. Therefore, to initialize a float variable use the suffix f or F. If you don't... Read More

When an object is created Constructor is get called first. A default constructor is created automatically if we do not create a constructor inside a class. Read More

No: First of all you cannot declare a method as 'private virtual'. Read More

Boxing converts a value-type to a reference-type, thus storing the object on the heap. Unboxing converts a reference-type to a value-type, thus storing the value on the stack.Difference between directcast and ctype. ... Read More

BY VAL: changes will not be reflected back to the variable. By REF: changes will be reflected back to that variable.( same as & symbol in c, c++) Read More

B) ( ) Read More

Page Index. Read More

Yes, you can use System.Environment.Exit(int exitCode) to exit the application or Application.Exit() if it’s a Windows Forms app.  Read More

The data value may not be changed. Note: The variable value may be changed, but the original immutable data value was discarded and a new data value was created in memory. Read More

Ans: B) Virtual it hides an inherited method with same signature by using Override method in derived class. Read More

The syntax for calling another constructor is as follows: class B { B(int i) { } } class C : B { C() : base(5) // call base constructor B(5) { } C(int i) : this() // call C() { } public static void... Read More

1. When the class itself is inherited from an abstract class, but not all base abstract methods have been overridden. 2. When at least one of the methods in the class is abstract. Read More

Multiple Inheritance is possible in C++, but its not possible in Java, and C#. what we are read above those are all we know, but as per my knowledge, in C++ to resolve multiple inheritance we are using "this pointer". But in C# there is no pointer... Read More

Answer B is correct. StringBuilder class is preferred for performing repeated operations on string since its value is mutable. String class represents a text value which is immutable. All operations on string class which appear to be modifying its... Read More

The controls that do not have events. Read More

Indexer is a special syntax for overloading [] operator for a class. After defining an indexer, array syntaxes can be used for the class objects. Read More

(B) /doc will generate xml documents Read More

Two. Once you write at least one constructor, C# cancels the freebie constructor, and now you have to write one yourself, even if there’s no implementation in it. Read More

Ans: A, Using Checked keyword we can enforce arithmetic overflow check within the specified code block. This option is used when we set the Arithmetic Overflow Check to false for the entire application. Incontrast if for the whole application u... Read More

The ans is csc.exe Read More

This keyword is used for reffering current object and Base keyword is used for referring parrent class. so ans. is C Read More

An object is early bound when it is assigned to a variable declared to be of a specific object type . Early bound objects allow the compiler to allocate memory and perform other optimizations before an application executes. ‘... Read More

The answer is A. The System.Globalization namespace contains classes that define culture-related information, including the language, the country/region, the calendars in use, the format patterns for dates, currency, and numbers, and the sort order... Read More

Supporting .Net, bcoz DLL made in C#.Net semicompiled version. Its not a com object. It is used only in .Net Framework.As it is to be compiled at runtime to byte code. Read More

Yes, so <Student> and <student> are different elements. Read More

Use Debug class for debug builds, use Trace class for both debug and release builds. Read More

Windows Authentication is trusted because the username and password are checked with the Active Directory, the SQL Server authentication is untrusted, since SQL Server is the only verifier participating in the transaction. Read More

Answer1 It would work fine. As the runtime type of 123.34 would be double, and Double can be converted to Integer. Answer2 the ctype(123.34,integer) will work fine no errors Read More

[Obsolete] public int Foo() {…} or [Obsolete(”This is a message describing why this method is obsolete”)] public int Foo() {…} Read More

Ans: A, D The system always reads the current value of a volatile object at the point it is requested, even if the previous instruction asked for a value from the same object. Also, the value of the object is written immediately on assignment. ... Read More

It is the diamond of death problem. Multiple Inheritance means the ability to inherit from more than a single direct base class. For example: class Derived : public Base1, private Base2 { //... }; Allowing MI introduces the possibility that a class... Read More

delegate void MyMethod(int y) ; Read More

Hello i have written this code my project it working fine // Create dataset DataSet ds=new DataSet() //readXml file ds.readXml(Server.MapPath("*.xml")) //Create datalist object let's protected System.Web.UI.WebControls... Read More

Multiple inheritence in C# is achived by using Interfaces. Read More

The fixed statement sets a pointer to a managed variable and "pins" that variable during the execution of statement. Without fixed, pointers to managed variables would be of little use since garbage collection could relocate the variables... Read More

A class that cannot be instantiated. A concept in C++ known as pure virtual method. A class that must be inherited and have the methods over-ridden. Essentially, it’s a blueprint for a class without any... Read More

Yes, if you are debugging via Visual Studio.NET, just go to Immediate window. Read More

Q: If a base class has a number of overloaded constructors, and an inheriting class has a number of overloaded constructors; can you enforce a call from an inherited constructor to a specific base constructor? A: Yes, just... Read More

client side . there is no need to go to validate user input. If it relates to data base validation we need to validate at server side. Read More

Preprocessing before going to IIS. Read More

No. If you want to get something that works like the following C code: #define A 1 use the following C# code: class MyConstants { public const int A = 1; } Then you use MyConstants.A where you would otherwise use the... Read More

Yes. Read More

Inheritance in C# is similar to cpp, if you are familiar to cpp, the only difference is you dont inherit a class in public or protected mode, the way to inherit a class is Class Base { protected int length, breadth; public Base(int a, int b) { this... Read More

Making class as Abstract Read More

True Read More

Place a colon and then the name of the base class. Notice that it’s double colon in C++. Read More

Documentation looks the same.  Use Debug class for debug builds, use Trace class for both debug and release builds.  Read More

Boxing converts a value-type to a reference-type, thus storing the object on the heap.  Unboxing converts a reference-type to a value-type, thus storing the value on the stack. Read More

Server side. Read More

datatext datavalue Read More

C# (pronounced C-sharp) is a new object oriented language from Microsoft and is derived from C and C++. It also borrows a lot of concepts from Java too including garbage collection. Read More

Yes. Set all references to null and then call System.GC.Collect(). If you need to have some objects destructed, and System.GC.Collect() doesn’t seem to be doing it for you, you can force finalizers to be run by setting all the... Read More

Web Services might use it, as well as non-Windows applications. Read More

Answer1 Manifest is metadata about assemblies. Metadata is machine-readable information about a resource, or “”data about data.” In .NET, metadata includes type definitions, version information, external assembly references,... Read More

There are imperative and interrogative functions. Imperative functions are the one which return a value while the interrogative functions do not return a value. Read More

No. C# does not support multiple inheritance, so you cannot inherit from more than one base class. You can however, implement multiple interfaces. Read More

Partial Class is spilt UI Logic and Business logic in separate files. Multiples developers can work on the same class file. At the compilation time it will treat as single file by it class name. Read More

ans: B) System.Int32 Read More

well, actually, we can use pointers in C#..only tht we should mark the code as unsafe and before compiling we should use the tag unsafe. Read More

) Console.ReadLine(); Read More

) Constructors should have the same name as class name B) Constructors have to be public so that class can be instantiated C) Constructors can not be overloaded All is currect........ Read More

Value, and its datatype depends on whatever variable we’re changing. Read More

No, use interfaces instead. Read More

Classes in the same namespace Read More

Yes, but they are not accessible, so looking at it you can honestly say that they are not inherited. But they are. Read More

It’s available to derived classes and classes within the same Assembly (and naturally from the base class it’s declared in) Read More

System.Object. Read More

When overriding, you change the method behavior for a derived class. Overloading simply involves having a method with the same name within the class. Read More

The method can be over-ridden. Read More

No, you can’t, the signature of the virtual method must remain the same, only the keyword virtual is changed to keyword override. Read More

No, moreover, you cannot access private methods in inherited classes, have to be protected in the base class to allow any sort of access. Read More

Yes, that’s what keyword sealed in the class definition is for. The developer trying to derive from your class will get a message: cannot inherit from Sealed class WhateverBaseClassName. It’s the same concept... Read More

Yes, just leave the class public and make the method sealed. Read More

When at least one of the methods in the class is abstract. When the class itself is inherited from an abstract class, but not all base abstract methods have been over-ridden. Read More

It’s an abstract class with public abstract methods all of which must be implemented in the inherited classes. Read More

They all must be public. Therefore, to prevent you from getting the false impression that you have any freedom of choice, you are not allowed to specify any accessibility, it’s public by default. Read More

Yes, why not. Read More

It’s up to you to implement the method inside your own class, so implementation is left entirely up to you. This might cause a problem on a higher-level scale if similarly named methods from different interfaces expect different... Read More

In the interface all methods must be abstract; in the abstract class some methods can be concrete. In the interface no accessibility modifiers are allowed, which is ok in abstract classes. Read More

Different parameter data types, different number of parameters, different order of parameters. Read More

Yes, just place a colon, and then keyword base (parameter list to invoke the appropriate constructor) in the overloaded constructor definition inside the inherited class. Read More

System.String is immutable; System.StringBuilder was designed with the purpose of having a mutable string where a variety of operations can be performed. Read More

StringBuilder is more efficient in the cases, where a lot of manipulation is done to the text. Strings are immutable, so each time it’s being operated on, a new instance is created. Read More

No. Read More

The first one performs a deep copy of the array, the second one is shallow. Read More

By calling Sort() and then Reverse() methods. Read More

HashTable. Read More

A sorted HashTable. Read More

Yes. Read More

A catch block that catches the exception of type System.Exception. You can also omit the parameter data type in this case and just write catch {}. Read More

No, once the proper catch code fires off, the control is transferred to the finally block (if there are any), and then whatever follows the finally block. Read More

Well, if at that point you know that an error has occurred, then why not write the proper code to handle that error instead of passing a new Exception object to the catch block? Throwing your own exceptions signifies some... Read More

A delegate object encapsulates a reference to a method. In C++ they were referred to as function pointers. Read More

It’s a delegate that points to and eventually fires off several methods. Read More

Assembly versioning allows the application to specify not only the library it needs to run (which was available under Win32), but also the version of the assembly. Read More

An MSI installer, a CAB archive, and XCOPY command. Read More

When you write a multilingual or multi-cultural application in .NET, and want to distribute the core application separately from the localized modules, the localized assemblies that modify the core application are called... Read More

System.Globalization, System.Resources. Read More

Single-line, multi-line and XML documentation comments. Read More

Compile it with a /doc switch. Read More

Single line code example and multiple-line code example. Read More

CorDBG – command-line debugger, and DbgCLR – graphic debugger. Visual Studio .NET uses the DbgCLR. To use CorDbg, you must compile the original C# file using the /debug switch. Read More

It points to the object that’s pointed to by this reference. Object’s instance data is shown. Read More

In debug compilation, assert takes in a Boolean condition as a parameter, and shows the error dialog if the condition is false. The program proceeds without any interruption if the condition is true. Read More

The tracing dumps can be quite verbose and for some applications that are constantly running you run the risk of overloading the machine and the hard drive there. Five levels range from None to Verbose, allowing to fine... Read More

To the Console or a text file depending on the parameter passed to the constructor. Read More

Attach the aspnet_wp.exe process to the DbgClr debugger. Read More

Positive test cases (correct data, correct output), negative test cases (broken or missing data, proper handling), exception test cases (exceptions are thrown and caught properly) Read More

Presentation (UI), business (logic and underlying code) and data (from storage or other sources). Read More

SQLServer.NET data provider is high-speed and robust, but requires SQL Server license purchased from Microsoft. OLE-DB.NET is universal for accessing other sources, like Oracle, DB2, Microsoft Access and Informix, but it... Read More

It returns a read-only dataset from the data source when the command is executed. Read More

The wildcard character is %, the proper query with LIKE would involve ‘La%’. Read More

Transaction must be Atomic (it is one unit of work and does not dependent on previous and following transactions), Consistent (data is either committed or roll back, no “in-between” case where something has been... Read More

Windows Authentication (via Active Directory) and SQL Server authentication (via Microsoft SQL Server username and passwords). Read More

Web Services might use it, as well as non-Windows applications Read More

The database name to connect to. Read More

Microsoft.Access. Read More

Deletes it from the memory. Read More

Multiple processes must agree that they will share the same connection, where every parameter is the same, including the security settings. Read More

No. Read More

It is available to any sub-class (a class inheriting this class). Read More

Yes, but they are not accessible.  Although they are not visible or accessible via the class interface, they are inherited.  Read More

It is available to classes that are within the same assembly and derived from the specified base class.  Read More

The data value may not be changed.  Note: The variable value may be changed, but the original immutable data value was discarded and a new data value was created in memory.  Read More

System.Object.  Read More

System.String is immutable.  System.StringBuilder was designed with the purpose of having a mutable string where a variety of operations can be performed.  Read More

StringBuilder is more efficient in cases where there is a large amount of string manipulation.  Strings are immutable, so each time a string is changed, a new instance in memory is created. Read More

No.  Read More

The Clone() method returns a new array (a shallow copy) object containing all the elements in the original array.  The CopyTo() method copies the elements into another existing array.  Both perform a shallow copy.  A... Read More

HashTable.  Read More

By calling Sort() and then Reverse() methods.  Read More

A sorted HashTable.  Read More

Yes. Read More

A catch block that catches the exception of type System.Exception.  You can also omit the parameter data type in this case and just write catch {}.  Read More

No.  Once the proper catch block processed, control is transferred to the finally block (if there are any).  Read More

Presentation (UI), Business (logic and underlying code) and Data (from storage or other sources).  Read More

Place a colon and then the name of the base class. Example: class MyNewClass : MyBaseClass  Read More

Yes.  The keyword “sealed” will prevent the class from being inherited.  Read More

Yes.  Just leave the class public and make the method sealed. Read More

1. When the class itself is inherited from an abstract class, but not all base abstract methods have been overridden. 2.  When at least one of the methods in the class is abstract.  Read More

A class that cannot be instantiated.  An abstract class is a class that must be inherited and have the methods overridden.  An abstract class is essentially a blueprint for a class without any implementation.  Read More

Interfaces, like classes, define a set of properties, methods, and events. But unlike classes, interfaces do not provide implementation. They are implemented by classes, and defined as separate entities from classes.  Read More

They all must be public, and are therefore public by default.  Read More

Yes.  .NET does support multiple interfaces.  Read More

It’s up to you to implement the method inside your own class, so implementation is left entirely up to you. This might cause a problem on a higher-level scale if similarly named methods from different interfaces expect different... Read More

In an interface class, all methods are abstract - there is no implementation.  In an abstract class some methods can be concrete.  In an interface class, no accessibility modifiers are allowed.  An abstract class may... Read More

Structs are value-type variables and are thus saved on the stack, additional overhead but faster retrieval.  Another difference is that structs cannot inherit.  Read More

Value.  The data type of the value parameter is defined by whatever data type the property is declared as.  Read More

The method or property can be overridden.  Read More

When overriding a method, you change the behavior of the method for the derived class.  Overloading a method simply involves having another method with the same name within the class.  Read More

No.  The signature of the virtual method must remain the same.  (Note: Only the keyword virtual is changed to keyword override)  Read More

Different parameter data types, different number of parameters, different order of parameters.  Read More

A delegate object encapsulates a reference to a method.  Read More

A delegate that has multiple handlers assigned to it.  Each assigned handler (method) is called. Read More

Yes.  Read More

Single-line comments, multi-line comments, and XML documentation comments.  Read More

Compile it with the /doc switch. Read More

1.   CorDBG – command-line debugger.  To use CorDbg, you must compile the original C# file using the /debug switch. 2.   DbgCLR – graphic debugger.  Visual Studio .NET uses the DbgCLR.  Read More

In debug compilation, assert takes in a Boolean condition as a parameter, and shows the error dialog if the condition is false.  The program proceeds without any interruption if the condition is true.  Read More

The tracing dumps can be quite verbose.  For applications that are constantly running you run the risk of overloading the machine and the hard drive.  Five levels range from None to Verbose, allowing you to fine-tune the... Read More

To the Console or a text file depending on the parameter passed to the constructor.  Read More

Attach the aspnet_wp.exe process to the DbgClr debugger.  Read More

Yes.  If you are debugging via Visual Studio.NET, just go to Immediate window.  Read More

It returns a read-only, forward-only rowset from the data source.  A DataReader provides fast access when a forward-only sequential read is needed.  Read More

SQLServer.NET data provider is high-speed and robust, but requires SQL Server license purchased from Microsoft. OLE-DB.NET is universal for accessing other sources, like Oracle, DB2, Microsoft Access and Informix.  OLE-DB.NET is... Read More

Let’s say you want to query database with LIKE for all employees whose name starts with La. The wildcard character is %, the proper query with LIKE would involve ‘La%’.  Read More

A transaction must be: 1.       Atomic - it is one unit of work and does not dependent on previous and following transactions. 2.       Consistent - data is either... Read More

Windows Authentication is trusted because the username and password are checked with the Active Directory, the SQL Server authentication is untrusted, since SQL Server is the only verifier participating in the transaction.  Read More

The database name to connect to.  Read More

Deletes it from the memory. To Do: answer better.  The current answer is not entirely correct.  Read More

Assembly versioning allows the application to specify not only the library it needs to run (which was available under Win32), but also the version of the assembly.  Read More

Multiple processes must agree that they will share the same connection, where every parameter is the same, including the security settings.  The connection string must be identical. Read More

When you write a multilingual or multi-cultural application in .NET, and want to distribute the core application separately from the localized modules, the localized assemblies that modify the core application are called satellite... Read More

An MSI installer, a CAB archive, and XCOPY command.  Read More

System.Globalization and System.Resources. Read More

an Assembly. Read More

As a good rule, you should not call the garbage collector.  However, you could call the garbage collector when you are done using a large object (or set of objects) to force the garbage collector to dispose of those very large... Read More

Use Boxing. Read More

Server side code will execute at server end all the business logic will execute at server end where as client side code will execute at client side at browser end. Read More

IT keeps the data of the control during post backs. if we turn off the values should not populate during server round trip. Read More

Server.Trnasfer will prevent round trip. it will redirect pages which or in the same directory. NO way to pass the query strings . Thru http context we can able to get the previous page control values. ... Read More

Web services are best suite for Hetrogenious environment. Remoting is best suite for Homogenious environment. The systems that under CLR. Read More

DIsconnected architechure . Maintainace relation schemas. MUtilple table grouping. Connected one . Read More

APplication_start need for global variable which are available over the application. Sesssion_Start : login dependent ( user dependent) Read More

Q: If I’m developing an application that must accomodate multiple security levels though secure login and my ASP.NET web appplication is spanned across three web-servers (using round-robbin load balancing) what would be the... Read More

ANS : ASP . Interprepter.. use the script engine. ASP.Net Compiled. Read More

Function overloading. Operator overloading. Read More

Heridity. Use the existing functionality along with its own properities. Read More

Derived Class : Basecalss VB.NEt : Derived Class Inherits Baseclass Read More

A Basic unit of executable code > Which contains : Manifest - Meta data versioning , Calture , IL, Reference Read More

inline function bind at compile time can write in aspx page with in <% %> . Read More

is an xml grammer. it talk about state of node in xml file. Read More

IT can be hacked . page is size is heavy. Read More

Session - mode State sever OUtprocess sql Read More

Install Mod_AspDotNet Add at the end of C:Program FilesApache GroupApache2confhttpd.conf the following lines Read More

Microsoft Intermeidate lanaguage. which is the out put for all the .net supported languages after comiplation will produce. Appreciation for cross language support. Read More

INIT, PageLoad, Prerender , UNload. Read More

Fill() Read More

NO Read More

ITemtemplate Read More

AlternateItemTemplate Read More

Datasource, DataBind Read More

System.Web.UI.Page Read More

abondon() Read More

disablecookies. Read More

control to validate, error message Read More

autogenerated columns is set to false Read More

Cooke = ne cookee(). cooke.adddate. Read More

hyper link column Read More

server.transfer Read More

UDDI Read More

Autogenerate columns Read More

get Read More

compare filed validator Read More

no Read More

as many as u want.. Read More

[Rama Naresh Talluri] There are Two types of JIT compilers. Read More

[Rama Naresh Talluri] Private Public/Shared Satellite assembly Read More

[Rama Naresh Talluri] This Global Assembly Cache(GAC) stores .NET assemblies to be shared by several applications on that computer. Read More

[Rama Naresh Talluri] In Asseblyinfo file need specify assembly version. assembly: AssemblyVersion Read More

[Rama Naresh Talluri] 1. TLBIMP to create an Assembly from a COM component 2. Reference a COM component directly from .NET Editor Read More

[Rama Naresh Talluri] 1. create certificate request [ =>Right click on the website (VD) =>Click Directory Security Tab and click Server Certificate => Type name of certificate , Organization name , server name ... Read More

[Rama Naresh Talluri] Yes. Write debugger statement to stop the cursor for debugging . Read More

[Rama Naresh Talluri] wsdl utility we can test by consuming our service either windows / web application Read More

[Rama Naresh Talluri] [assembly: AssemblyDescription("Debug")] Read More

[Rama Naresh Talluri] 1.Client Side [ Query string, hidden variables, view state,cookies] 2.Server side [application , session, database] Read More

[Rama Naresh Talluri] .Net provides powerful access to the IL code generation process through the System.CodeDom.Compiler and Microsoft.CSharp and Microsoft.VisualBasic namespaces. In these namespaces we can find the tools that... Read More

[Rama Naresh Talluri] Server.Transfer Read More

[Rama Naresh Talluri] //Create a new instance of the Web Service Class localhost.Service1 service = new MyWebServiceApp.localhost.Service1(); //Make the asynchronous Web Service call and call WriteHello service... Read More

[Rama Naresh Talluri] <script language =”javascript”> Function init() { Service.useservice(“/services/test.asmx?WSDL”, “MyTest”); Var iCallID; iCallID = service.MyTest.callService(“add”,1,2); ... Read More

InProc OutProc [State server, sql] Read More

A multicast delegate can call more than one method. Read More

Prevent the creation of instance for a class Read More

Finalize is called by the Garbage Collector, and the state of manage objects cannot be guaranteed, so we can not reference them. Also, we cannot determine when the GC will run, and which objects it will Finalize. Dispose is called... Read More

Singleton pattern is used to make sure that only one instance of a given class exists. Read More

Structures are value types; classes are reference types. Structures use stack allocation; classes use heap allocation. All structure elements are Public by default; class variables and constants are Private by... Read More

DOM Approach is useful for small documents in which the program needs to process a large portion of the document. SAX approach is useful for large documents in which the program only needs to process a small portion of the document... Read More

DOM Approach is useful for small documents in which the program needs to process a large portion of the document. SAX approach is useful for large documents in which the program only needs to process a small portion of the document... Read More

A textual object is a well-formed XML document if it satisfies all the following points 1. Taken as a whole, it matches the production labeled document. 2. It meets all the well-formedness constraints given in this specification. ... Read More

Recordset provides data one row at a time. Connection is open . Dataset is a data structure which represents the complete table data at same time. Dataset is just a data store and manipulation is done through DataAdapters... Read More

No. Read More

No. The access modifier on a property applies to both its get and set accessors. What you need to do if you want them to be different is make the property read-only (by only providing a get accessor) and create a private/internal set... Read More

No. Static indexers are not Read More

Yes. The code in the finally always runs. If you return out of the try block, or even if you do a goto out of the try, the finally block always runs: using System; class main { public static void Main() { try { Console... Read More

You should declare the variable as an int, but when you pass it in you must specify it as ‘out’, like the following: int i; foo(out i); where foo is declared as follows: [return-type] foo(out int o) { } Read More

In the past, you had to call .ToString() on the strings when using the == or != operators to compare the strings’ values. That will still work, but the C# compiler now automatically compares the values instead of the references... Read More

Global attributes must appear after any top-level using clauses and before the first type or namespace declarations. An example of this is as follows: using System; [assembly : MyAttributeClass] class X {} Note that in an IDE... Read More

[Obsolete] public int Foo() {...} or [Obsolete("This is a message describing why this method is obsolete")] public int Foo() {...} Note: The O in Obsolete is always capitalized. Read More

You want the lock statement, which is the same as Monitor Enter/Exit: lock(obj) { // code } translates to try { CriticalSection.Enter(obj); // code } finally { CriticalSection.Exit(obj); } Read More

Here’s a quick example of the DllImport attribute in action: using System.Runtime.InteropServices; class C { [DllImport("user32.dll")] public static extern int MessageBoxA(int h, string m, string c, int type); public static int Main() {... Read More

You must use the Missing class and pass Missing.Value (in System.Reflection) for any values that have optional parameters.  Read More

Assemblies are the smallest units of versioning and deployment in the .NET application. Assemblies are also the building blocks for programs such as Web services, Windows services, serviced components, and .NET remoting applications. ... Read More

Private assembly is used inside an application only and does not have to be identified by a strong name. Shared assembly can be used by multiple applications and has to have a strong name.  Read More

A strong name includes the name of the assembly, version number, culture identity, and a public key token. Read More

Use the directive in the XML .config file for a given application. < probing privatePath=c:mylibs; bindebug /> should do the trick. Or you can add additional search paths in the Properties box of the deployed application. ... Read More

Use the Assembly Binding Log Viewer (fuslogvw.exe) to find out the paths searched. Read More

Global assembly cache. Read More

With the help of Strong Name tool (sn.exe).  Read More

Usually C:winntassembly or C:windowsassembly. Read More

Yes, remember that GAC is a very special folder, and while normally you would not be able to place two files with the same name into a Windows folder, GAC differentiates by version number as well, so it’s possible for MyApp.dll... Read More

Q : So let’s say I have an application that uses MyApp.dll assembly, version 1.0.0.0. There is a security bug in that assembly, and I publish the patch, issuing it under name MyApp.dll 1.1.0.0. How do I tell the... Read More

Delay signing allows you to place a shared assembly in the GAC by signing the assembly with just the public key. This allows the assembly to be signed with the private key at a later stage, when the development process is complete and... Read More

Yes, that is what keyword sealed in the class definition is for. The developer trying to derive from your class will get a message: cannot inherit from Sealed class WhateverBaseClassName. It is the same concept as final class in... Read More

Yes, just place a colon, and then keyword base (parameter list to invoke the appropriate constructor) in the overloaded constructor definition inside the... Read More

You should declare the variable as an int, but when you pass it in you must specify it as ’out’, like the following: int i; foo(out i); where foo is declared as follows: [return-type] foo(out int o) { } Read More

You need to use the /target:library compiler option.  Read More

You must use the Missing class and pass Missing.Value (in System.Reflection) for any values that have optional parameters. Read More

Yes. Read More

Yes. Try-catch-finally blocks are supported by the C# compiler. Here’s an example of a try-catch-finally block: using System; public class TryTest { static void Main() { try { Console.WriteLine("In Try... Read More

Yes. The .NET class libraries provide support for regular expressions. Look at the documentation for the System.Text.RegularExpressions namespace. Read More

Yes. Here’s a simple example: using System; class Class1 { private string[] MyField; public string[] MyProperty { get { return MyField; } set { MyField = value; } } } class MainClass { public static int Main... Read More

Windows Authentication (via Active Directory) and SQL Server authentication (via Microsoft SQL Server username and passwords)  Read More

When you write a multilingual or multi-cultural application in .NET, and want to distribute the core application separately from the localized modules, the localized assemblies that modify the core application are called satellite... Read More

When overriding, you change the method behavior for a derived class. Overloading simply involves having a method with the same name within the class. Read More

When at least one of the methods in the class is abstract. When the class itself is inherited from an abstract class, but not all base abstract methods have been over-ridden. Read More

Value, and its datatype depends on whatever variable we are changing. Read More

Use the regasm.exe utility to generate a type library (if needed) and the necessary entries in the Windows Registry to make a class available to classic COM clients. Once a class is registered in the Windows Registry with regasm.exe,... Read More

Use a conditional attribute on the method, as shown below: class Debug { [conditional("TRACE")] public void Trace(string s) { Console.WriteLine(s); } } class MyClass { public static void Main() { ... Read More

Unfortunately, this is currently not supported in the IDE. To do this from the command line, you must compile your projects into netmodules (/target:module on the C# compiler), and then use the command line tool al.exe (alink) to link... Read More

Two. Once you write at least one constructor, C# cancels the freebie constructor, and now you have to write one yourself, even if there is no implementation in Read More

Try using RegAsm.exe. The general syntax would be: RegAsm. A good description of RegAsm and its associated switches is located in the .NET SDK docs. Just search on "Assembly Registration Tool".Explain ACID rule of thumb for... Read More

This is currently not supported by Visual Studio .NET. Read More

They all must be public. Therefore, to prevent you from getting the false impression that you have any freedom of choice, you are not allowed to specify any accessibility, it is public by default. Read More

There is no way to restrict to a namespace. Namespaces are never units of protection. But if you’re using assemblies, you can use the ’internal’ access modifier to restrict access to only within the assembly.  ... Read More

The word checked is a keyword in C#. Read More

The most common problem is that you used a lowercase ’m’ when defining the Main method. The correct way to implement the entry point is as follows: class test { static void Main(string[] args) {} }  Read More

The method can be over-ridden. Read More

The following is a response from a developer on the C# compiler team: We get rid of unused locals (i.e., locals that are never read, even if assigned). We get rid of unreachable code. We get rid of try-catch w/... Read More

The following code should run the executable and wait for it to exit before continuing: using System; using System.Diagnostics; public class ProcessTest { public static void Main(string[] args) { Process p = Process... Read More

The first one performs a deep copy of the array, the second one is shallow. Read More

The equivalent of inout in C# is ref. , as shown in the following example: public void MyMethod (ref String str1, out String str2) { ... } When calling the method, it would be called like this: String s1; String s2; s1 = ... Read More

The easiest way is to use goto: using System; class BreakExample { public static void Main(String[] args) { for(int i=0; i<3; i++) { Console.WriteLine("Pass {0}: ", i); for( int j=0 ; j<100 ; j++ ) { ... Read More

The difference is that static read-only can be modified by the containing class, but const can never be modified and must be initialized to a compile time constant. To expand on the static read-only case a bit, the containing class... Read More

The database name to connect to. Read More

System.String is immutable; System.StringBuilder was designed with the purpose of having a mutable string where a variety of operations can be performed. Read More

System.Object.  Read More

Yes, if you are debugging via Visual Studio.NET, just go to Immediate window. Read More

Yes, just leave the class public and make the method sealed Read More

With regard to versioning, interfaces are less flexible than classes. With a class, you can ship version 1 and then, in version 2, decide to add another method. As long as the method is not... Read More

Windows Authentication is trusted because the username and password are checked with the Active Directory, the SQL Server authentication is untrusted, since SQL... Read More

Strings are not null terminated in the runtime, so embedded nulls are allowed. Console.WriteLine() and all similar methods continue until the end of the string. Read More

StringBuilder is more efficient in the cases, where a lot of manipulation is done to the text. Strings are immutable, so each time it is being operated on, a new instance is created. ... Read More

Some security exceptions are thrown if you are working on a network share. There are some parts of the frameworks that will not run if being run off a share (roaming profile, mapped drives, etc.). To see if this is what’s... Read More

Some sample code follows: using System; using System.Threading; class ThreadTest { public void runme() { Console.WriteLine(... Read More

Single-line, multi-line and XML documentation comments. Read More

Single line code example and multiple-line code example. Explain the three services model (three-tier application). Presentation (UI), business (logic and underlying code) and data (from storage or other sources). ... Read More

Place a colon and then the name of the base class. Notice that it is double colon in C++. Read More

Original Visual J++ code: public synchronized void Run() { // function body } Ported C# code: class C { public void Run() { lock(this) { // function body } } public static void Main() {} } Read More

Not exactly. You can create an alias within a single file with the "using" directive: using System; using Integer = System.Int32; // alias But you can’t create a true alias, one that extends beyond the file in which it is... Read More

No. The access modifier on a property applies to both its get and set accessors. What you need to do if you want them to be different is make the property read-only (by only providing a get accessor) and create a private/internal... Read More

No. Static indexers are not allowed in C#. Read More

No. However, there are plans for C# to support a type of template known as a generic. These generic types have similar syntax but are instantiated at run time as opposed to compile time. You can read more about them here. Read More

No. C# does, however, support the concept of an indexer from language spec. An indexer is a member that enables an object to be indexed in the same way as an array. Whereas properties enable field-like access, indexers enable array... Read More

No. C# does not have macros. Keep in mind that what some of the predefined C macros (for example, __LINE__ and __FILE__) give you can also be found in .NET classes like System.Diagnostics (for example, StackTrace and StackFrame), but... Read More

No. Read More

No. Read More

No, you cannot, the signature of the virtual method must remain the same, only the keyword virtual is changed to keyword override Read More

No, use interfaces instead. Read More

No, once the proper catch code fires off, the control is transferred to the finally block (if there are any), and then whatever follows the finally block.  Read More

No, moreover, you cannot access private methods in inherited classes, have to be protected in the base class to allow any sort of access. Read More

Microsoft.Access. Read More

Make sure that the target type set in the project properties setting is set to Windows Application, and not Console Application. If you’re using the command line, compile with /target:winexe & not target:exe. Read More

Let us say you want to query database with LIKE for all employees whose name starts with La. The wildcard character is %, the proper query with LIKE would involve La%. Read More

It returns a read-only dataset from the data source when the command is executed.  Read More

It points to the object that is pointed to by this reference. Object’s instance data is shown. Read More

It is available to derived classes and classes within the same Assembly (and naturally from the base class it is declared in). Read More

It is a delegate that points to and eventually fires off several methods. Read More

It is an abstract class with public abstract methods all of which must be implemented in the inherited classes. Read More

In the past, you had to call .ToString() on the strings when using the == or != operators to compare the strings’ values. That will still work, but the C# compiler now automatically compares the values instead of the references... Read More

In debug compilation, assert takes in a Boolean condition as a parameter, and shows the error dialog if the condition is false. The program proceeds without any interruption if the condition is true. Read More

In a garbage collected environment, it’s impossible to get true determinism. However, a design pattern that we recommend is implementing IDisposable on any class that contains a critical resource. Whenever this class is consumed... Read More

If you try to instantiate the class inside the try, it’ll be out of scope when you try to access it from the catch block. A way to get around this is to do the following: Connection conn = null; try { conn = new... Read More

If you leave off the return type on a method declaration, the compiler thinks you are trying to declare a constructor. So if you are trying to declare a method that returns nothing, use void. The following is an example: // This results... Read More

Here’s an example: using System; class StringToInt { public static void Main() { String s = "105"; int x = Convert.ToInt32(s); Console.WriteLine(x); } } Read More

Here’s a quick example of the DllImport attribute in action: using System.Runtime.InteropServices; class C { [DllImport("user32.dll")] public static extern int MessageBoxA(int h, string m, string c,... Read More

HashTable. Read More

Global attributes must appear after any top-level using clauses and before the first type or namespace declarations. An example of this is as follows: using System; [assembly : MyAttributeClass] class X {} ... Read More

From language spec: The list of similarities between classes and structs is as follows. Longstructs can implement interfaces and can have the same kinds of members as classes. Structs differ from classes in several important ways;... Read More

Documentation looks the same. Use Debug class for debug builds, use Trace class for both debug and release builds. Read More

Different parameter data types, different number of parameters, different order of parameters. Read More

Deletes it from the memory. Read More

Compile it with a /doc switch. Read More

Casting the char to an int will give you the ASCII value: char c = ’f’; System.Console.WriteLine((int)c); or for a character in a string: System.Console.WriteLine((int)s[3]); The base class libraries also offer ways to do... Read More

Classes in the same namespace.  Read More

C# has the is operator: expr is type Read More

C# requires only a single parameter for delegates: the method address. Unlike other languages, where the programmer must specify an object reference and the method to invoke, C# can infer both pieces of... Read More

C# has finalizers (similar to destructors except that the runtime doesn’t guarantee they’ll be called), and they are specified as follows: class C { ~C() { // your code } public static void Main() {} ... Read More

C# does not support an explicit fall through for case blocks. The following code is not legal and will not compile in C#: switch(x) { case 0: // do something case 1: // do something in common with 0 default: /... Read More

By using the Registry and RegistryKey classes in Microsoft.Win32, you can easily access the registry. The following is a sample that reads a key and displays its value: using System;using Microsoft.Win32; class regTest { public... Read More

Assuming you’ve done a "using System;": [Obsolete] public int Foo() {...} or [Obsolete("This is a message describing why this method is obsolete")] public int Foo() {...}... Read More

All methods marked with the DllImport attribute must be marked as public static extern. Read More

A delegate object encapsulates a reference to a method. In C++ they were referred to as function pointers Read More

In the interface all methods must be abstract; in the abstract class some methods can be concrete. In the interface no accessibility modifiers are allowed, which is ok in abstract classes.  Read More

A class that cannot be instantiated. A concept in C++ known as pure virtual method. A class that must be inherited and have the methods over-ridden. Essentially, it is a blueprint for a class without any implementation. _break Read More

No. Read More

It is available to any sub-class (a class inheriting this class). Read More

System.String is immutable. System.StringBuilder was designed with the purpose of having a mutable string where a variety of operations can be performed. Read More

A sorted HashTable.   Read More

A catch block that catches the exception of type System.Exception. You can also omit the parameter data type in this case and just write catch {}.  Read More

Place a colon and then the name of the base class. Example: class MyNewClass : MyBaseClass Read More

Presentation (UI), Business (logic and underlying code) and Data (from storage or other sources). Read More

Yes. The keyword “sealed” will prevent the class from being inherited. Read More

Yes. Just leave the class public and make the method sealed. Read More

... Read More

... Read More

Value. The data type of the value parameter is defined by whatever data type the property is declared as. Read More

When overriding a method, you change the behavior of the method for the derived class. Overloading a method simply involves having another method with the same name within the class. Read More

No. The signature of the virtual method must remain the same. (Note: Only the keyword virtual is changed to keyword override)  Read More

Different parameter data types, different number of parameters, different order of parameters. Read More

Yes, just place a colon, and then keyword base (parameter list to invoke the appropriate constructor) in the overloaded constructor definition inside the inherited class. Read More

... Read More

Attach the aspnet_wp.exe... Read More

A transaction must be: 1. Atomic - it is one unit of work and does not dependent on previous and following transactions. ... Read More

Windows Authentication is trusted because the username and password are checked with the Active Directory, the SQL Server authentication is untrusted, since SQL Server is the only verifier participating in the transaction. Read More

... Read More

Deletes it from the memory. Read More

Assembly versioning allows the application to specify not only the library it needs to run (which was available under Win32), but also the version of the assembly. Read More

Use Boxing. Read More

It would throw an InvalidCast exception as the runtime type of 123.34 (double) doesnt match with Integer. Read More

Answer1 A Sub does not return anything whereas a Function returns something. Answer2 -A Sub Procedure is a method will not return a value -A sub procedure will be defined with a “Sub” keyword Sub ShowName... Read More

Value type - bool, byte, chat, decimal, double, enum , float, int, long, sbyte, short, strut, uint, ulong, ushort Value types are stored in the Stack Reference type - class, delegate, interface, object, string Reference types... Read More

Two types of properties in .Net: Get and Set Read More

Constructor is a method in the class which has the same name as the class (in VB.Net its New()). It initializes the member attributes whenever an instance of the class is created. Read More

Answer1 There is a perfect tool provide by .net frameworks calls Garbage collector, where by mean of GC we can clean up the object and reclaim the memory. The namespace used is System.GC Answer2 the run time will... Read More

Call the dispose method from code for clean up of objects Read More

Timer control. Read More

65536. Read More

Locked Property. Read More

No. Read More

It is available to classes that are within the same assembly and derived from the specified base class. Read More

The Clone() method returns a new array (a shallow copy) object containing all the elements in the original array. The CopyTo() method copies... Read More

By calling Sort() and then Reverse() methods. Read More

C# supports a very similar range of basic types to C++, including int, long, float, double, char, string, arrays, structs and classes. In C# Types The names may be familiar, but many of the details are different. For example, a long... Read More

Place a colon and then the name of the base class. Example: class DerivedClassName: BaseClassName Read More

Make sure your C# code conforms to the Common Language Subset (CLS). To help with this, add the [assembly: CLSCompliant (true)] global attribute to your C# source files. The compiler will emit an error if you use a C# feature which is... Read More

The params keyword can be applied on a method parameter that is an array. When the method is invoked, the elements of the array can be supplied as a comma separated list.So, if the method parameter is an object array, void... Read More

Readonly fields are delayed initalized constants. However they have one more thing different is that; When we declare a field as const it is treated as a static field. where as the Readonly fields are treated as normal class variables... Read More

No fall-throughs allowed. Unlike the C++ switch statement, C# does not support an explicit fall through from one case label to another. If you want, you can use goto a switch-case, or goto default. case 1: cost += 25; ... Read More

An instance constructor implements code to initialize the instance of the class. A static constructor implements code to initialize the class itself when it is first loaded. Read More

Class1 c1 = new Class1(); Class1 c2 = new Class1(); Class1 c3 = new Class1();   By definition, a static constructor is fired only once when the class is loaded. An instance constructor on the other hand is fired... Read More

Use the new modifier to explicitly hide a member inherited from a base class. To hide an inherited member, declare it in the derived class using the same name, and modify it with the new modifier. Read More

class a { public virtual int m() { return 1; } } class b:a { public int j() { return m(); } } Read More

It is possible if it’s a static method. It is possible by inheriting from that class also.It is possible from derived classes using base keyword. Read More

Method overriding is a feature that allows you to invoke functions (that have the same signatures) that belong to different classes in the same hierarchy of inheritance using the base class reference. C# makes use of two keywords:... Read More

A class that cannot be instantiated. An abstract class is a class that must be inherited and have the methods overridden. An abstract class is essentially a blueprint for a class without any implementation. Read More

... Read More

It is available to classes that are within the same assembly and derived from the specified base class. Read More

Yes, just place a colon, and then keyword base (parameter list to invoke the appropriate constructor) in the overloaded constructor definition inside the inherited class. Read More

Mark it as sealed. Read More

The indexers are usually known as smart arrays in C# community. Defining a C# indexer is much like defining properties. We can say that an indexer is a member that enables an object to be indexed in the same way as an array. ... Read More

The fixed statement sets a pointer to a managed variable and “pins” that variable during the execution of statement. Without fixed, pointers to managed variables would be of little use since garbage collection could relocate... Read More

Ans.Destructors are called in reverse order of constructors. First destructor of most derived class is called followed by its parent’s destructor and so on till the topmost class in the hierarchy. You don’t have control... Read More

Ans.In C#, virtual keyword can be used to mark a property or method to make it overrideable. Such methods/properties are called virtual methods/properties.By default, methods and properties in C# are non-virtual. Read More

No, First of all you cannot declare a method as ‘private virtual’. Read More

Yes, but it’s generally not a good idea. The mechanics of object construction in .NET are quite different from C++, and this affects virtual method calls in constructors.C++ constructs objects from base to derived, so when the... Read More

Use the abstract modifier on the method. The class must also be marked as abstract (naturally). Note that abstract methods cannot have an implementation (unlike pure virtual C++ methods). Read More

No. Like C++, methods are non-virtual by default, but can be marked as virtual. Read More

When you define a class that inherits from a base class, you sometimes want to redefine one or more of the base class elements in the derived class. Shadowing and overriding are both available for this purpose. Comparison It... Read More

A C# destructor is really just an override of the System.Object Finalize method, and so is virtual by definition Read More

No. They look the same but they are very different. The C# destructor syntax (with the familiar ~ character) is just syntactic sugar for an override of the System.Object Finalize method. This Finalize method is called by the garbage... Read More

Very similar, but there are some significant differences. First, C# supports constructor chaining. This means one constructor can call another:class Person { public Person( string name, int age ) { … } public Person(... Read More

Yes, but what’s the point, since it will call Finalize(), and Finalize() has no guarantees when the memory will be cleaned up, plus, it introduces additional load on the garbage collector. The only time the finalizer should be... Read More

C# divides types into two categories - value types and reference types. Most of the intrinsic types (e.g. int, char) are value types. Structs are also value types. Reference types include classes, arrays and strings. The basic idea is... Read More

C# and VB.NET use structured error handling (unlike VB6 and earlier versions where error handling was implemented using Goto statement). Error handling in both VB.NET and C# is implemented using Try..Catch..Finally construct (C#... Read More

The code in finally block is guaranteed to run, irrespective of whether an error occurs or not. Critical portions of code, for example release of file handles or database connections, should be placed in the finally block. Read More

Yes, in fact exceptions are the recommended error-handling mechanism in C# (and in .NET in general). Most of the .NET framework classes use exceptions to signal errors. Read More

A catch block that catches the exception of type System. Exception. You can also omit the parameter data type in this case and just write catch {} Read More

Well, if at that point you know that an error has occurred, then why not write the proper code to handle that error instead of passing a new Exception object to the catch block? Throwing your own exceptions signifies some design flaws... Read More

Syntax for Two Dimensional Array in C Sharp is int[,] ArrayName; Read More

In C++, a struct and a class are pretty much the same thing. The only difference is the default visibility level (public for structs, private for classes). However, in C# structs and classes are very different. In... Read More

In the past, you had to call .ToString() on the strings when using the == or != operators to compare the strings’ values. That will still work, but the C# compiler now... Read More

Supporting .Net, because DLL made in C#.Net semi compiled version. It’s not a com object. It is used only in .Net Framework As it is to be compiled at runtime to byte code. Read More

The answer is False because it is given that A.equals(B) returns true i.e. objects are equal and now its hashCode is asked which is always independent of the fact that whether objects are equal or not. So, GetHashCode for both of the... Read More

It is definitely possible to debug other .Net languages code in a C# project. As everyone knows .net can combine code written in several .net languages into one single assembly. Same is true with debugging. Read More

Not exactly. The .NET Framework has a comprehensive class library, which C# can make use of. C# does not have its own class library. Read More

There is no way to restrict to a namespace. Namespaces are never units of protection. But if you’re using assemblies, you can use the ‘internal’ access modifier to restrict access to only within the assembly. ... Read More

Yes, you can use System.Environment.Exit(int exitCode) to exit the application or Application.Exit() if it’s a Windows Forms app. Read More

The following is a response from a developer on the C# compiler team: We get rid of unused locals (i.e., locals that are never read, even if assigned). We get rid of unreachable code. We get rid of try-catch with an empty try. We get... Read More

Gotos are supported in C# to the fullest. In Java goto is a reserved keyword that provides absolutely no functionality. Read More

No, use interfaces instead. Read More

The code for the rest of the loop is ignored, the control is transferred back to the beginning of the loop. Read More

They aren't the same. An event is an event. A "delegate" assigns a particular event handler to an object instance. Thus, when an object event happens, the proper procedure/method is called. An example might help. I frequently code things so... Read More

If a base class have a virtual method it means that method must be override by the derived class using override keyword. Read More

No, Instead of this, we can inheritance the multiple interface, but C++ support multiple inheritance Read More

Shadowing :- This is a VB.Net Concept by which you can provide a new implementation for the base class member without overriding the member. You can shadow a base class member in the derived class by using the keyword "Shadows". The method... Read More

Object is an instance to call the methods and properties of the class. Read More

Lurd's Reflecter is tool by which we can see compelete information about the class, its members, functions, their signature and return type also. we may say metadata of any BCL. But It will not show coding, will show only metadata. LURD'S... Read More

The call stack Read More

Deep Copy-In Deep Copy it copies entire page or u can say all objects while in Shallow Copy-It Copies the some of the object Read More

System.Object Read More

In one .cs file there may be many classes having Main() method. While making the . exe you can define the class name as an entry point CSC /main:classname filename.cs Read More

 ApplicationDomain Read More

Abstraction : Abstraction works by abstracting common parts of objects and merging them into a single abstract class. An abstract class is a parent class that allows inheritance but can never be instantiated. Abstract classes contain one or more... Read More

csc Read More

Yes. The manifest inside the assembly will hold the details of all the files. ie it will store the name of the resource file etc. Read More

Application that are running in different Appplication Domaine can communicate each other. so the answer for the above question is TRUE. Read More

In Call stack window in MS Visual Studio IDE. Read More

you cannot convert OCX to dll becoz dll do not have GUI interfaces .IF your ocx does not have GUI and you have convert manuly by cut and paste from OCX to Dll project Read More

B is the right choice. since readonly field can only be initialized at the time of construction of the object. that means if you wanna initialize the readonly property that intialize it inside the constructor. Read More

It is possible to have multiple Main() methods in C# program. But, you have to explicitly identify which Main method is the entry point at the run-time. C++ and Java Programmers, take note that Main starts with capital 'M' and the return... Read More

SqlExceptionclass is created whenever the .NET Framework Data Provider for SQL Server encounters an error generated from the server. (Client side errors are thrown as standard common language runtime exceptions.) SqlException always contains at... Read More

Hashtable Read More

Answer: Classes in the same namespace. Read More

A) Use of attributes B) Strong data typing C) Object orientation & use of interface Read More

Actually JIT activation is required for COM+ components which can be done by setting JustInTimeActivation attribute to true (choice A). For .net applications / components JIT comes in by default. Read More

B) False Read More

If the project is compiled using /main switch with the compiler then the project compiles successfully. For example: class A { public static void Main(string[] args) { Console.WriteLine("Main in class A"); } } class B { public... Read More

Answer A is correct. Once it will reach size 16 addding element in the arraylist, it will be automatically double the size. Read More

Static method cannot be overridden. Look into the following code: package javabeat.net; public class ParentClass { public void method1(){ System.out.println("Parent Method1"); } public static void method2(){ System.out.println("Parent... Read More

Delegates holds the reference to the method. Read More

Defination: A performance optimization based on using collections of pre-allocated resources, such as objects or database connections With the advent of the .NET platform, writing code that pools objects and threads has become a simple task. By... Read More

 True Read More

Thread is nothing more than a process.On the computer thread is a process moving through time.Thread is analogous to the operating system process in which your application runs.Every application runs with atleast one thread.Threads run parallel... Read More

The ArrayList object is a collection of items containing a single data value. Items are added to the ArrayList with the Add() method. The following code creates a new ArrayList object named mycountries and four items are added: <script runat=... Read More

You should be aware, however, that it is not permitted to supply implementations of any of the members of an interface. This is a line of C# Professional 3rd edition book pressed wrox Page No 124 So it is not posible to implement methods... Read More

Two. Once you write at least one constructor, C# cancels the freebie constructor, and now you have to write one yourself, even if there is no implementation in it. Read More

 Java Read More

Ans: B, AppendFormat() method is called. Read More

 GarbageCollection Read More

Assemblies may or may not be executables. exe or dllclass modules had no entry pont.entry point means public void static main() method Read More

The Answer is A X++ as it is the next increment value of X and X+=1 is it shows the initial value of X and then again an incremented value where as X= X+1 is only equal to X++. Read More

A) ( ) Read More

 conversion of reference types to value types Read More

there are three types of assemply. 1. private - used by single app. 2. public/shared - used by more than one applications 3. Satelite - contains culture informations Read More

The Common Language Specification (CLS) describes a set of features that different languages have in common. The CLS includes a subset of the Common Type System (CTS). Read More

unsafe int ThisMethod(){} Read More

Platform-specific Executable code Read More

every statement in c sharp must end with semi colon.it indicates statement completed. Read More

using System Read More

{ } Read More

let's you have 2classes Class A is the base class Class B is the derived class Class B:A is the syntax to inherit a base class Read More

A Delegate in c# allows to pass a method of class to object of other class. Rules in Deligation:- 1.In order to create a Delegate a Signature(parameter) must match Signature of object. 2.Define all the methods which has the same Signature... Read More

False In some cases you may want to call not just one, but two or more methods through a single delegate. This is known as multicasting. You accomplish multicasting by encapsulating the various methods in delegates, and then you combine the... Read More

Question : Give me Change syntax of color change (1)Background color (2)font color (3)size of font Answers: Suppose you have a label having name is label1 then code is as follows For background color: label1.Style... Read More

Answer is A) Same parameter types but different return values. Function overloading depends on the 1) parameter types 2) number of parameters 3) order of parameters Read More

B) Managed Code Read More

ans: It's available to derived classes and classes within the same Assembly (and naturally from the base class it's declared in). Read More

overriding keyword cahnge behavour in derive class with same signature, Overloading means same name but passing different datatype or different number arguments within the same class Read More

GetEnumerator() returns a reference to System.Collections.Ienumerator class which allows a simple iteration over a collection Read More

Is Operator Read More

using System.IO namespace and FileStream and StreamWriter classes. Read More

Client Side: This is code/routines that are not processed at all by the server. Code is written in scripts (javascript usually) - plain text commands that instruct the client to do something. Generally used for performing dynamic effects, such as... Read More

A) Indexer is a special syntax for overloading [] operator for a class. After defining an indexer, array syntaxes can be used for the class objects. Read More

A) Static methods and fields of a class can be used without creating an object. The syntax is A.x() where A is the class name and x() is a static method contained in it. Read More

Well we can go for declaring the data members inside the class but not defining them that is we can't initialize the data members.The reason is, memory is allocated only when an object of the class is created.Thus inside the class if we go for... Read More

Ans: B In the System.Object class, equals() is defined as public virtual bool Equals(object obj); Read More

For .Net environment language does does not matter as all code compile in IL. Read More

we are using "using" for compiler make it easier to qualify an identifier to a namespace or class. and dotnet Framework has a list of the system-defined namespaces to identify system namespace we are using "System" example: using System; Read More

 True Read More

Answer is (B) False: It is definitely possible to debug other .Net languages code in a C# project. As everyone knows .net can combine code written in several .net languages into one single assembly. Same is true with debugging. Read More

ValueType a STRUCTURE not a CLASS. Boxed types are not value types. Read More

Enumerations Read More

Unlike COM, the common language runtime does not use reference counting to govern object lifetime. Instead, the garbage collector traces object references and identifies objects that can no longer be accessed by running code. Read More

Group of classes categorized to avoid name clash Read More

Static Read More

 String Read More

If the variable is class variable then it will be assigned the default value(in case of integer it is 0). But if the variable is a local variable (like variable declared inside a function) and not initialized then the compiler will throw an error... Read More

New keyword Read More

Followings are the member of System.Object Equals() GetHashCode() GetType() Object() ReferenceEquals ToString Read More

C) b Read More

Ans: A, we use () to enclose the condition with if statement Read More

 IEnumerable Read More

If Out parameters are not assigned a value with in the function body compiler throws error Read More

Length Property Read More

A) [ ] Read More

If (X==3) Read More

Ans. B) Sizeof operator The sizeof operator is used to obtain the size in bytes for a value type. A sizeof expression takes the form: sizeof(type) where type is the value type of which the size is obtained Read More

Long to Byte Read More

I find this table from MSDN to be useful to explain differences between shadowing and overriding: The main constraint on overriding is that it needs permission from the base class with the 'overridable' keyword. Shadowing does not require... Read More

True: All local variables in a method must be initialized before using them. However, data member variables of a class are assigned default values even if the programmer does not explicitly initialize them. The defaults are zero for numeric types,... Read More

A value-type field variable is initialized to its default value, which is equal to the value computed by the value type's default constructor. A reference type field variable is initialized to its default value, which is null. All numeric... Read More

Ans: B) objThis = new ThisObject(); C) objThis = new ThisObject(); Read More

a local variable in c# which is declared in for loop is in local scope as for as the body of loop closes the scope closes too Read More

bool is a value type Read More

No Read More

Struct is a user defined datatype that can contains multiple datatypes.This gives it an extra edge over arrays because we don't have to create multiple arrays for stroing different values Read More

B, C# support 32-bit signed integer Read More

A char in C# is 16 bits since it incorporates support for unicode. Read More

(B) is correct: string is a predefined reference type. The C# lang specification on MSDN states 'The string type is a sealed class type that inherits directly from object. Instances of the string class represent Unicode character... Read More

B) and (C): 'object' and 'string' are predefined reference types. 'string' is a sealed class type which inherits directly from object. Read More

System.Object class Read More

Java Byte Code is similar to IL Read More

just in timeJIT is stands for just in time compiler. it also compiles your application from bytecode to native code or manage code. it'll also responsible for automatic memory management. three types of JIT are available. 1) normal jit. 2)... Read More

Having been a vb4-vb6 hack, VB.NET is NOT rooted in vb6. Sure, some of the keywords are the same, but VB.NET WAS completely rewritten and designed from the ground up for .net. VB.NET is closer to C# then it is to vb6. If that weren't the case... Read More

By the interface we can go for the multiplle inhertiance also so my answer ids corrget for tHAT Read More

False: There is facility to add 'unmanaged' code in C# which need not be CLS compliant. Read More

XML documentation Read More

All are correct, all are supported forms of commenting, it's just that /// is specifically for functionality in XML documentation. Read More

Used to provide extra information for the compiler Read More

Yes used in Exception handling Read More

Depends on the whether base class is 'sealed'. If it is declared as 'sealed' you can't inherit from it. If it is not marked as sealed then it is possible to derive from a class in the base class library. Read More

No answer available currently. Be the first one to reply to this question by submitting your answer from the form below.   Read More

Start() Thread thr=new Thread(new ThreadStart(fn1)); thr.Start(); Read More

system is a main base class. through which u can access the properties of other class. namespace is basically collection of class libraries. like system.io. but system is main base class. Read More

System Read More

) Avoid name clashes between data types Read More

Yes Read More

Yes,It is possible. Here Example: interface x { //give method } interface y { //Give method } class z:x,y { //implement the interfaces method } Read More

structs can inherit interfaces Read More

 abstract class cannot be instantiated Read More

a delegate having multiple handlers assigned to it Read More

False.The virtual keyword is needed to specify that a method should override a method (or implementaion an abstract method) of its base class. Read More

 Immediate window Read More

Manifest Read More

Method overloading means having two methods with the same name but different signatures in the same scope. These two methods may exist in the same class or one in base class and another in derived class. Method overriding means having a different ... Read More

"One important thing to make clear is that C# is a language in its own right. Although it is designed to generate code that targets the .NET environment,it is not itself part of .NET. There are some features that are supported by .NET only and not C#... Read More

A) DLLImport Read More

A function pointer in c# Read More

Events in C# are implemented by using delegates. Read More

) Garbage Collection Read More

Value types are stored on stack and referance types are stored on heaps Read More

the Heap Read More

 is responsible for automatic memory management Read More

true, we can call GC using System.GC.Collect() method. Read More

Ans is Code access security.... Read More

It's actually Application Domains. Application Domains in turn can contain one or more threads. Read More

Get assembly metadata using code Read More

Menifest is an area where assembly metadat is stored Read More

using .NET remoting services Read More

All of the above Read More

class DerivedClass: BaseClass{ } Read More

I guess we always have to check Sisira's answers. The opposite to that will be right. Common' its 4GB!!! Read More

System.GC.Collect() Read More

enum Read More

reflection Read More

System.Reflection Read More

Comman Type System Read More

Common Language Runtime Read More

IL - Intermediate language. which can compile your source code to bytecode in form of metadata. with the help of msil compiler. Read More

CLR converts programing language into micro soft intermediate language.this is the first level of .net compilation. Read More

Base class library Read More

But...ASP.net can be programmed on C#!! "ASP.NET pages coded in C# constitute an xcellent medium for User Interfaces" ----pg 25, professional C#,3rd edition Read More

A) class libraries Read More

B) .cs Read More

 Main() Read More

) Console.WriteLine() Read More

To call a method, you just give the name and parameters. The correct way to call public static void Main() is to use 'Main();'. I'm not sure why the answer isn't C.The proper way to _declare_ the Main(0 function isstatic void Main... Read More

C) int x; Read More

Java Programming language is not supported with .Net Framework hence you cannot inherit javaclass in C# class.Also Java has JavaByte code after compiling similar to MSIL which is similar but cannot inherit due to framework support. Read More

Serialization is the process of converting object into byte stream which is useful to transport object(i.e remoting),persisting object(i.e files,database) Read More

No only function marked as abstract shoud be implemented.the following code runs fine abstract public class base class { public abstract void method1(); public void method2(){Console.WriteLine("Base Method 2");} } public class derivedclass:baseclass ... Read More

Value :parameter gets passed into the class' set method Read More

Access is limited to the containing class or types derived from it Read More

An assembly is logical unit of code. it is physically exists in the DLL/ EXE Assemblies of two types private assemblies shared assemblies the assembly which is used by single application is called private assembly shared assembly is known as... Read More

By using "sealed" keyword we can restrict a class from inheritence. Read More

control.Click += new EventHandler(MyEvent) Read More

Wrapper Classes are the classes that wrap up the primitive values in to a class that offer utility method to access it . For eg you can store list of int values in a vector class and access the class. Also the methods are static and hence you can use... Read More

Class can be internal not protected or not even protected internal. Class can have only two access modifiers Public and internal. if any field or method having access modifier protected internal then this field available to the others assemblies... Read More

No we cannot instanciate abstract class we hav to extend it first ex- abstract class A {} class B : A {} Class C { B b=new B; } Read More

No we can not use friend keyword but instead c# provide "internal" keyword for friend Read More

if program successfully complie . but program is not run or execute. then give an exception. Read More

Instead of using new keyword we can use create object like in this example we are creating object to write in excel sheet through our programexampleImports Excel = Microsoft.Office.Interop.ExcelPrivate Sub Button1_Click(ByVal sender As System.Object,... Read More

string ConStrFromWeb=System.Configuration.ConfigurationSettings.AppSettings["ConStringKey"]; // Here ConStringKey is the key name of connection string in web.config Read More

String, Integer, Double, Date, Currency Read More

Constructors are class methods that are executed when an object of a given type is created. Constructors have the same name as the class, and usually initialize the data members of the new object Read More

1) In VB6.0 and c++ strings are simple array of bytes, but in .Net it is class System.String and is immutable. 2) A string is a sequential collection of Unicode characters, which usually is used to represent text. A String, on the other hand, is... Read More

Question : This is a Regular expression built for parsing string in vb.net and passed to Regex class. Dim r As Regex = New Regex(",(?=([^""]*""[^""]*"")*(?![^""]*""))") What is C# equivalent for this regular expression. Answers: ... Read More

Default function argument is a function argument with a default value. Callers of this function have a choice whether to pass a value for default argument or not. If a function call passes a value for default argument it is used as its value. If a... Read More

Document Type Declaration(DTD) <!DOCTYPE root-element [ doctype-declaration... ]> determines the name of the root element and contains the document type declarations Elements Elements are the main building blocks of both XML and HTML... Read More

HasRows property is only for DataReader objects. For DataSet you can check whether it has a DataTable or not .. since the DataSet is a collection of DataTable you can check whether it has loaded a table or not using the following code DataSet dt=new... Read More

No. ex. Base Class: /// Summary description for BaseA. /// </summary> public class BaseA { private BaseA() { // // TODO: Add constructor logic here // } } Dervied Class: ... Read More

If the XML is not well-formed, a warning is generated and the documentation file will contain a comment saying that an error was encountered. For more information on well-formed XML, Read More

A. is the correct answer bcoz In c# previously i had used in, As,Of keywordas used but i didn'nt used is keyword, plz let me know any further queries. Read More

The derived class can provide new functionality by overriding the virtual method of the base class. The method to be called is determined at the run-time depending on the type of the object calling the method, and it does not depend on the type... Read More

Both A and B are correct choices. Declaring a static function as virtual generates build error. Same with declaring member fields as virtual. A static function can be called only using class_name.static_function_name() syntax, so there is no run... Read More

Interfaces must always be declared as public so that they can be implemented or inherited Read More

D is the correct choice Virtual keyword is meaningful when the derived class is expected to override base class method. Here a class will 'implement' a method of an interface, hence virtual is not meaningful for interface methods. ... Read More

A is the correct answer. By default all the members in an Interface definition are public, so there is no need to declare access modifier public. It would be a compile time error otherwise Read More

sealed classes cannot be inherited as the sealed classes provides full functionality only the classes that have no full functionality can be inherited Read More

C# supports two types of constructor, a class constructor (static constructor) and an instance constructor (non-static constructor). Static constructor is used to initialize static data members as soon as the class is referenced first time,... Read More

Answer is (A) True. Catch and finally blocks are just like other code blocks, and you can write any legitimate C# code, including try, throw, catch and finally. Read More

False Events are signals generated by an object to indicate occurrence of an action, while delegates are type safe function pointers. An event is a way for a class to signal state change / an interesting action. Delegates are reference types... Read More

#Region and #EndRegion indicates a block of code which can be expanded / collapsed. Read More

Ans: A. They are enclosed with in []. Read More

We only need to refer System.Text namespace. StringBuilder Class is contained in the System.Text namespace. hence we need to add the following lines in pur code: using System.Text; Read More

Answer is: Dsubstring(); Read More

C) Removes the object at position 1 Read More

Actually operator "=" adds an element too. The following example adds key-value pair "x"-"value" to Hashatble h: HashTable h = new HashTable(); h("x") = "value"; Read More

The answer is False because it is given that A.equals(B) returns true i.e. objects are equal and now its hashCode is asked which is always independent of the fact that whether objects are equal or not. So, GetHashCode for both of the objects returns... Read More

Answer is (A) Load assembly to running process Read More

C) is correct. Assembly class provides the following methods to load an assembly: Load LoadFrom LoadFile LoadWithPartialName LoadModule Read More

We can load assemblies into GAC more than one version. We can use any version what ever we want. But this is not possible in the case of com. Read More

Answer: A) Inside an assembly?s manifest Read More

C) [ STAThread ] Read More

System.Reflection Read More

Ans: A--- TopDown Always a parent class constructor is executed before child class' constructor does .. when u instantiate a child/derived class. Read More

 resgen Read More

 .resx Read More

Public policies are applied on Shared Assemblies. Read More

True Read More

Ans: All the above BufferedStream,MemoryStream and FileStream all these 3 classes are inherited from System.IO.Stream class. Read More

CanBePooled Read More

An application called AXImp. exe shipped with .Net SDK is used. This application does something similar as Tlbimp.exe does for non graphical COM components. It creates a wrapper component that contains the type information that the .Net... Read More

B) False Read More

Windows NT & Above Read More

Serialization Read More

Answer (A) is correct. Destructors are called in reverse order of constructors. First destructor of most derived class is called followed by its parent's destructor and so on till the topmost class in the hierarchy. You don't have... Read More

int[] arr = new int[3]; arr[0] = 4; arr[1] = 1; arr[2] = 5; Array.Sort(arr); Array.Reverse(arr); Read More

Ans: B) // Read More

MSIL code is the intermediate code which is platform independent. When MSIL is compiled actual platform dependent code is generated. Read More