C Pointers

C Pointers: Interview questions

Part 1 | Part 2 | Part 3 | Part 4 | Part 5 | Part 6 | Part 7

C Pointers - August 06, 2008 at 13:10 PM by Amit Satpute Compare array with pointer. Answer The following declarations are NOT the same: char *p; char a[20]; The first declaration allocates memory for a pointer; the second allocates memory for 20 characters. What is NULL pointer? Answer A null pointer does not point to any object. NULL and 0 are interchangeable in pointer contexts.Usage of NULL should be considered a gentle reminder that a pointer is involved. It is only in pointer contexts that NULL and 0 are equivalent. NULL should not be used when another kind of 0 is required.  Describe pointer in brief. What is a void pointer? List the difference between pointer and array. Define NULL pointer.