C Programming MCQs With Answer

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C Programming Online Quiz

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• Test Name: C Programming MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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C Programming Quiz

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1 / 40

Which function is used to convert a string to an integer in C?

itoa()

strtof()

atoi()

2 / 40

What is the purpose of the do-while loop in C?

Iterate over a list

Execute a block of statements repeatedly

Loop with a condition

3 / 40

________ is used to increment a variable by 1 in C.

--

++

1

4 / 40

________ is the operator used to access the value stored at a memory address in C.

*

->

&

5 / 40

What is the purpose of the typedef keyword in C?

Import libraries

Declare variables

Define custom data types

6 / 40

How do you declare a function in C that takes no arguments and returns an integer?

functionName(int) {...}

int functionName() {...}

int functionName(void) {...}

7 / 40

What is the output of printf("%f", 3/2); in C?

1

1

1.5

8 / 40

________ is used to specify the size of an array in C.

[]

()

{}

9 / 40

________ is used to check if a condition is true or false in C.

if-else

if

switch-case

10 / 40

What is the output of printf("%c", 'A' + 1); in C?

66

B

A

11 / 40

What does the rand() function do in C?

Compute factorial

Round a number

Generate a random number

12 / 40

How do you declare a pointer in C?

int *ptr;

pointer int;

*ptr = int;

13 / 40

What is the correct syntax for a for loop in C?

for (i = 0; i <= 10) {...}

for (i = 0; i < 10; i++) {...}

loop (i = 0; i < 10; i++) {...}

14 / 40

Which of the following is not a valid control structure in C?

if-else

repeat-until

switch-case

15 / 40

What is the purpose of #include directive in C?

Print a message

Define a macro

Include a header file

16 / 40

Which of the following is not a valid escape sequence in C?

v

a

t

17 / 40

________ is used to compare two values in C.

=

<>

==

18 / 40

What is the output of printf("%d", sizeof(int)); in C?

Size of int in characters

Size of int in bytes

Size of int in bits

19 / 40

What does the sizeof() operator return in C?

Size in characters of a variable

Size in bits of a variable

Size in bytes of a variable

20 / 40

What is the purpose of the continue statement in C?

Exit the loop

Print a message

Skip the current iteration

21 / 40

What is the correct syntax for declaring a variable in C?

num = int;

variable num;

int num;

22 / 40

What does the fclose() function do in C?

Read a file

Close a file

Open a file

23 / 40

What is the correct syntax for a switch-case statement in C?

switch-case (variable) { 1: ... }

switch variable { case 1: ... }

switch (variable) { case 1: ... }

24 / 40

________ is used to terminate a statement in C.

;

:

,

25 / 40

Which function is used to allocate memory dynamically in C?

realloc()

malloc()

calloc()

26 / 40

Which of the following is a valid identifier in C?

_myVar

1abc

break

27 / 40

Which of the following is not a valid data type in C?

float-point

double

char

28 / 40

Which of the following is not a valid arithmetic operator in C?

**

+

*

29 / 40

In C, how do you declare a constant?

var keyword

constant keyword

const keyword

30 / 40

What does the strcpy() function do in C?

Compare two strings

Copy a string

Convert a string

31 / 40

Which header file is needed to use functions like printf() and scanf() in C?

string.h

stdio.h

math.h

32 / 40

________ is used to access the address of a variable in C.

&

*

%

33 / 40

________ is used to define a multi-line comment in C.

** ... **

/* ... */

//

34 / 40

Which operator is used to access structure members in C?

->

::

.

35 / 40

What does the scanf() function do in C?

Execute a function

Print output

Read input from the user

36 / 40

Which function is used to format output in C?

scanf()

printf()

format()

37 / 40

What is the purpose of the void keyword in C?

Indicates no return value

Represents a variable

Indicates a function call

38 / 40

What does the break statement do in a loop in C?

Exit the loop

Execute the next iteration

Skip the current iteration

39 / 40

What is the purpose of the enum keyword in C?

Define a set of named constants

Define array constants

Declare structure members

40 / 40

What is the correct way to initialize an array in C?

array arr = [1, 2, 3, 4, 5];

int arr[5] = {1, 2, 3, 4, 5};

int arr[] = {1, 2, 3, 4, 5};

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