Memory Allocation MCQs

Question 1

In C, which header file should be included to use dynamic memory allocation functions?

Accepted Answer

stdlib.h

Answer

malloc.h

Answer

memory.h

Answer

alloc.h

Question 2

What is the purpose of the 'malloc' function in C?

Accepted Answer

To allocate dynamic memory

Answer

To allocate static memory

Answer

To deallocate memory

Answer

To find memory leaks

Question 3

Which function is used to allocate an array of elements in C?

Accepted Answer

calloc()

Answer

malloc()

Answer

alloc()

Answer

array()

Question 4

What does the 'calloc' function in C do?

Accepted Answer

Allocates and initializes memory to zero

Answer

Allocates memory and leaves it uninitialized

Answer

Deallocates memory

Answer

Checks for memory leaks

Question 5

Which function is used to change the size of an allocated block of memory in C?

Accepted Answer

realloc()

Answer

resize()

Answer

modify()

Answer

change()

Question 6

What is the return value of the 'malloc' function if it fails to allocate memory?

Accepted Answer

Answer

-1

Answer

0

Answer

1

Question 7

How do you release dynamically allocated memory in C?

Accepted Answer

free()

Answer

release()

Answer

deallocate()

Answer

clear()

Question 8

What is the purpose of the 'memset' function in C?

Accepted Answer

To set memory to zero

Answer

To allocate memory

Answer

To find memory leaks

Answer

To copy memory

Question 9

Which function is used to copy a block of memory in C?

Accepted Answer

memcpy()

Answer

copymem()

Answer

memcopy()

Answer

memorycopy()