Muhammad Imdad Ullah

Test your foundational C programming knowledge with this concise 31-question MCQ Online C Language Quiz. Perfect for students and developers to practice key concepts on functions, variables, loops, and file handling in C. Let us start with the Online C Language Quiz now.

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Created by Muhammad Imdad Ullah

Inter C Language 10

Online C/ C++ Language Quiz for Computer Science Students

1 / 31

Which of the following modes opens only an existing file for both reading and writing

"w"

"w+"

"r+"

"a+"

2 / 31

On successfully closing a file, the fclose() returns

1(one)

File Pointer

NULL

0(zero)

3 / 31

Another name for a built-in function is

Arithmetic function

Library function

User-defined function

All of these

4 / 31

If you want a user to enter exactly 20 values, which loop would be the best to use?

infinite

while

do-while

for

5 / 31

Function declaration is also known as function ------------?

prototype

parameters

definition

header

6 / 31

Which of the following is true about a function call?

Stops the execution of the program

Resumes the execution of the program

Transfers control to the called function

Transfers control to the main function

7 / 31

-------------- iterates at least once if the condition is false.

while loop

do-while loop

for loop

All of these

8 / 31

An array subscript should be

an array

double

int

float

9 / 31

Local variables are also called

Automatic variable

Run time variable

Static variable

Register variable

10 / 31

printf() is a ?

Built-in function

User-defined function

Local function

Keyword

11 / 31

Memory allocated to a local variable at the time of its

Declaration

First reference

Definition

Destruction

12 / 31

A function can return ------------- value.

4

3

2

1

13 / 31

The do-while loop structure always ends with

semi colon

colon

brace

comma

14 / 31

The scope of a variable refers to its

Accssibility

Length

Name

Data type

15 / 31

A file is stored in

Hard disk

RAM

ROM

Cache

16 / 31

In a C program, two functions can have

same name but different parameters

same name and same parameters

same name

same parameters

17 / 31

What is the final value of $x$ after executing the following code for(int x = 0; x < 10; x++)?

9

8

10

11

18 / 31

The first line of the user-defined function is

Prototype

Header

Arguments

Calling

19 / 31

Global variables are created in

Cache

ROM

Hardisk

RAM

20 / 31

Function prototypes for built-in functions are specified in

header files

object files

source files

image files

21 / 31

Which of the following looks for the prototypes of functions used in a program?

Parser

Linker

Leader

Compiler

22 / 31

Memory is allocated to a local variable at the time of its

Definition

Declaration

Destruction

First reference

23 / 31

Formal arguments are also called

Dummy arguments

Original arguments

Actual arguments

Referenced arguments

24 / 31

A built-in function

can be redefined

should be redefined

cannot be redefined

cannot return a value

25 / 31

Multiple arguments to a function are separated by

Period

Semicolon

Colon

Commas

26 / 31

Which one is the loop structure?

if-else

switch

for

if

27 / 31

In the C language, the first line of a function definition is known as

Parameters

Function body

Arguments

Function header

28 / 31

A function that does not return anything has return type

void

null

Nothing

float

29 / 31

A semicolon is placed at the end of a condition in?

do-while loop

for loop

switch

while loop

30 / 31

What is the final value of i after executing the following code for(int=1; i<5; i+=2)?

9

7

5

6

31 / 31

A loop within a loop is called?

complex

infinite

for

nested

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Online C Language Quiz with Answers

• An array subscript should be
• On successfully closing a file, the fclose() returns
• Which of the following modes opens only an existing file for both reading and writing
• A file is stored in
• A function can return ————- value.
• Memory allocated to a local variable at the time of its
• The scope of a variable refers to its
• Local variables are also called
• Function declaration is also known as function ————?
• A function that does not return anything has a return type
• In the C language, the first line of a function definition is known as
• Multiple arguments to a function are separated by
• The first line of the user-defined function is
• Another name for a built-in function is
• Formal arguments are also called
• Global variables are created in
• Memory is allocated to a local variable at the time of its
• Which of the following is true about a function call?
• Which of the following looks for the prototypes of functions used in a program?
• In a C program, two functions can have
• Function prototypes for built-in functions are specified in
• A built-in function
• printf() is a?
• A loop within a loop is called?
• What is the final value of i after executing the following code for(int=1; i<5; i+=2)?
• Which one is the loop structure?
• If you want a user to enter exactly 20 values, which loop would be the best to use?
• What is the final value of $x$ after executing the following code for(int x = 0; x < 10; x++)?
• ————– iterates at least once if the condition is false.
• The do-while loop structure always ends with
• A semicolon is placed at the end of a condition in?

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