Pointers in C

1.	What is (void*)0?
	A. Representation of NULL pointer B. Representation of void pointer C. Error D. None of above Answer & Explanation Answer: Option A Explanation:

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2.	Can you combine the following two statements into one? char *p; p = (char*) malloc(100);
	A. char p = *malloc(100); B. char *p = (char) malloc(100); C. char *p = (char*)malloc(100); D. char *p = (char *)(malloc*)(100); Answer & Explanation Answer: Option C Explanation:

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3.	In which header file is the NULL macro defined?
	A. stdio.h B. stddef.h C. stdio.h and stddef.h D. math.h Answer & Explanation Answer: Option C Explanation: The macro "NULL" is defined in locale.h, stddef.h, stdio.h, stdlib.h, string.h, time.h, and wchar.h.

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4.	How many bytes are occupied by near, far and huge pointers (DOS)?
	A. near=2 far=4 huge=4 B. near=4 far=8 huge=8 C. near=2 far=4 huge=8 D. near=4 far=4 huge=8 Answer & Explanation Answer: Option A Explanation: near=2, far=4 and huge=4 pointers exist only under DOS. Under windows and Linux every pointers is 4 bytes long.

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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?
	A. . B. & C. * D. -> Answer & Explanation Answer: Option D LINK:www.indiabix.com