Pointers

The operator used to get value at address stored in a pointer variable is

A.	*
B.	&
C.	&&
D.	\|\|

Answer: Option A

Explanation:

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A pointer is

A.	A keyword used to create variables
B.	A variable that stores address of an instruction
C.	A variable that stores address of other variable
D.	All of the above

Answer: Option C

Explanation:

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What would be the equivalent pointer expression for referring the array element a[i][j][k][l]

A.	((((a+i)+j)+k)+l)
B.	((((a+i)+j)+k)+l)
C.	(((a+i)+j)+k+l)
D.	((a+i)+j+k+l)

Answer: Option B

Explanation:

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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: Option D

Explanation:

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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: Option A

Explanation:

near=2, far=4 and huge=4 pointers exist only under DOS. Under windows and Linux every pointers is 4 bytes

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: Option C

Explanation:

The macro "NULL" is defined in locale.h, stddef.h, stdio.h, stdlib.h, string.h, time.h, and wchar.h.

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: Option C

Explanation:

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What is (void*)0?

A.	Representation of NULL pointer
B.	Representation of void pointer
C.	Error
D.	None of above

Answer: Option A

Explanation:

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Pointers

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