int a=10; int *p=&a; *p is called forward Reference......... Read More

Here is a small code segment to determine the endianess of a system at run time. short int number = 0x1; char * byte = (char*)&number; if ( byte[0] ) printf("Little endian"); else printf("Big endian"); Submitted by Pooja Agrawal ... Read More

bool F1(int byte,int pos) { return( (bool)(byte & 1<<pos) } Read More

Yes, we can do it. consider the following code.. #include<stdio.h> #include<conio.h> struct emp { int no; int empno; }; typedef struct emp empdata; main() { empdata edata; void display( empdata ); clrscr(); edata.no = 1; edata... Read More

4 levels: Single Multiple Multilevel Hybrid [Combination of the above types] Read More

1) Volatile: A variable should be declared volatile whenever its value could change unexpectedly. In practice, only three types of variables could change: ? Memory-mapped peripheral registers ? Global variables modified by an interrupt service... Read More

Advantage: Macros and Inline functions are efficient than calling a normal function. The times spend in calling the function is saved in case of macros and inline functions as these are included directly into the code. Disadvantage: Macros and... Read More

#include<stdlib.h> #include<stdio.h> int main() { int n = 1234; char p[20]; itoa(n,s,10); printf("n=%d,s=%s",n,s); return 0; } Read More

Arrays can't be passed by values. Because , the array name is evaluated to be a pointer to the first element of the array. e.g. when we pass array x, its equivalent to &x[0] i.e. pointer to the first element. Its type is, therefore, int *,... Read More

while(1) {} It is the best way to implement infinite loop. Read More

#define cat(x,y) x##y concatenates x to y. But cat(cat(1,2),3) does not expand but gives preprocessor warning. Why? in this case the cat(x,y) is the macro which is defined by using the preprocessor directive , this will be substituted only at the... Read More

Actually theres not much of difference between using psos or vxworks.A few differences in features are: 1.The psos priority is reverse of vxworks. 2.psos supports posix 1003.1 while vxworks it is 1003.1b. 3.In psos device driver architecture is... Read More

sizeof(0) returns the size of integer whose value is 0. Hence malloc would allocate sizeof(int) bytes and return a valid pointer. Read More

inline function's property says whenever it will called, it will copy the complete definition of that function. Recursive function declared as inline creates the burden on the compiler's execution. The size of the stack may/may not be... Read More

++*ip will increment the value to which ip points. ex: *ip=3; ++*ip; printf("%d",*ip); the output will be 4 after this operation ip will point towards the same memory location. It doesn't increments the memory location in this... Read More

-10 is integer, so it return 4 bytes.... Read More

#error is the preprocessor directive which produces compile time error messages. These directives are most useful for detecting programmer inconsistencies and violation of constraints during preprocessing. Consider : #if !defined(__Cplusplus) ... Read More

the time taken for the interrupt to active, at wat time it will relief from the interrupt Read More

protected & public members of the base class will be accessible in derived clas Read More

By the Template Class Read More

both are not equal Read More

Output will be: efd Explaination : , and  are escape sequences for new line, line feed and backspace respectively. Read More

Generally four types of storage classes are there in c. 1.Auto 2. Register 3.Static 4.Extern or Global Read More

Declare a static variable( class level variable) in the class and increment it every time u create an instance of the class. There is also some method to find the number of instance of a class.... Read More

yes we can have constant volatile variable. In this current context of code will not change the value of the variable but out side of the program i.e. hardware registers can change it. Read More

We can define structure bit field members with Dot operators. EXAMPLE: #include <stdio.h> int main() { Struct bit_field { Int x.4; // it allocates only 4 bits to x Char C.6; // it allocates only 6... Read More

Embedded System: System which is designed to perform a single or few dedicated functions. System with RTOS: also can be an embedde system but naturally RTOS will be used in realtime system which will be need to perform many functions. Real time... Read More

Static variables exists until the end of the main() function/method Read More

object based languages doesn't support Inheritance where as object oriented supports. c# is a object oriented language because it supports inheritance and asp.net is not a langugae it is a technology If the language supports ony 3 features i;e ... Read More

Hard real-time system doesn't allow any delay. Eg;- Missiles Soft Real-time system allow some microseconds of delay. Eg:- Washing machines, Mobiles Read More

No,Java is Not pure object oriented language as it supports primitive data types Read More

Interrupt latency refers to the amount of time between when an interrupt is triggered and when the interrupt is seen by software. Read More

Six Power plants are there in India, 1. TAPS (Tarapur Atomic Power Station), Tarapur, Maharastra 2. RAPS, Rawatbhata, Rajasthan 3. MAPS (Madras Atomic Power Station), Kalpakkam, Tamilnadu 4. NAPS Narora, Uttar Pradesh 5. KAPS Kakrapar, Gujarat ... Read More