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C Programming - Pointers

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Exercise : Pointers - General Questions
1.
What is (void*)0?
Representation of NULL pointer
Representation of void pointer
Error
None of above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
Can you combine the following two statements into one? 
char *p;
p = (char*) malloc(100);
char p = *malloc(100);
char *p = (char) malloc(100);
char *p = (char*)malloc(100);
char *p = (char *)(malloc*)(100);
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
In which header file is the NULL macro defined?
stdio.h
stddef.h
stdio.h and stddef.h
math.h
Answer: Option
Explanation:
The macro "NULL" is defined in locale.h, stddef.h, stdio.h, stdlib.h, string.h, time.h, and wchar.h.
4.
How many bytes are occupied by near, far and huge pointers (DOS)?
near=2 far=4 huge=4
near=4 far=8 huge=8
near=2 far=4 huge=8
near=4 far=4 huge=8
Answer: Option
Explanation:
near=2, far=4 and huge=4 pointers exist only under DOS. Under windows and Linux every pointers is 4 bytes long.
5.
If a variable is a pointer to a structure, then which of the following operator is used to access data members of the structure through the pointer variable?
.
&
*
->
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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