Function MCQs

Question 1

In C, what is a function primarily used for?

Accepted Answer

Code organization and reusability

Answer

Decision making

Answer

Variable declaration

Answer

Printing output

Question 2

What is the purpose of a function prototype in C?

Accepted Answer

To declare a function's name and parameters

Answer

To declare a function's return type

Answer

To declare a function's name

Answer

To declare a function's parameters and return type

Question 3

What is the result of the expression sqrt(16) in C, assuming proper inclusion of the math library?

Accepted Answer

4

Answer

8

Answer

2

Answer

Error

Question 4

In C, how are function arguments passed by default?

Accepted Answer

By value

Answer

By reference

Answer

By pointer

Answer

By address

Question 5

What is the correct way to declare a function in C that takes no arguments and returns an integer?

Accepted Answer

func();

Answer

int func();

Answer

func(int);

Answer

int func(int);

Question 6

In C, what is the purpose of the 'return' statement in a function?

Accepted Answer

To return a value from the function

Answer

To declare the function's return type

Answer

To exit the program

Answer

To define a function

Question 7

Which of the following is not a standard C library function for mathematical operations?

Accepted Answer

rand

Answer

pow

Answer

sqrt

Answer

abs

Question 8

What is the main advantage of using functions in C?

Accepted Answer

Reducing code redundancy and improving code organization

Answer

Increasing program speed

Answer

Eliminating the need for variables

Answer

Reducing memory usage

Question 9

What is a function's return type in C if it does not return any value?

Accepted Answer

void

Answer

int

Answer

float

Answer

char