C Fundamentals MCQs

Question 1

Which operator is used to compare two values for equality in C?

Accepted Answer

==

Answer

=

Answer

!=

Answer

<>

Question 2

What is the purpose of the 'const' keyword in C?

Accepted Answer

Declare a constant

Answer

Declare a variable

Answer

Define a function

Answer

Initialize a pointer

Question 3

Which data type is used to store a sequence of characters in C?

Accepted Answer

char

Answer

int

Answer

float

Answer

string

Question 4

In C, which operator is used for pointer-to-pointer relationships?

Accepted Answer

*

Answer

&

Answer

->

Answer

::

Question 5

What is the purpose of the 'sizeof' operator in C?

Accepted Answer

Get the size of a variable

Answer

Get the address of a variable

Answer

Perform arithmetic operations

Answer

Calculate square root

Question 6

What does the 'NULL' keyword represent in C?

Accepted Answer

A pointer to nothing

Answer

An empty string

Answer

A null character

Answer

An uninitialized variable

Question 7

Which library function is used to allocate memory dynamically in C?

Accepted Answer

malloc

Answer

free

Answer

sizeof

Answer

realloc

Question 8

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

Accepted Answer

Read formatted input

Answer

Print formatted output

Answer

Allocate memory

Answer

Execute a loop

Question 9

Which operator is used to access the value stored at a pointer address in C?

Accepted Answer

*

Answer

&

Answer

->

Answer

.