computer MCQs - 12th class Chapter 13 Mcqs

1

What is a self-contained piece of code that performs a specific task?

A

A variable

B

A function

C

A loop

D

A header file

2

The programming approach of dividing program logic into smaller modules is known as?

A

Unstructured programming

B

Object-oriented programming

C

Structured programming

D

Procedural programming

3

Which of the following is a primary benefit of using functions?

A

Increases program size

B

Decreases code reusability

C

Makes programs easier to understand and maintain

D

Makes debugging harder

4

Pre-defined functions like printf() and scanf() are packaged in?

A

Source files

B

Object files

C

Libraries

D

Executables

5

To use a built-in function in C, you must include the corresponding ___ in your program.

A

source file

B

header file

C

text file

D

object file

6

Functions that are written by the programmer to solve a specific problem are called?

A

Built-in functions

B

Library functions

C

Standard functions

D

User-defined functions

7

What are the three parts of a function header?

A

Return type, name, body

B

Name, parameters, body

C

Return type, name, parameters

D

Return type, parameters, body

8

The part of the function where variable declarations and program logic are implemented is called the?

A

Function header

B

Function prototype

C

Function call

D

Function body

9

Which statement is used to specify the value returned by a function?

A

void

B

exit

C

return

D

break

10

What is a function prototype?

A

The function's logic

B

A statement providing basic information about the function to the compiler

C

Another name for the function body

D

The execution of the function

11

A function prototype statement must end with which character?

A

A colon (:)

B

A period (.)

C

Curly braces {}

D

A semicolon (;)

12

What is the mechanism used to invoke a function to perform a specific task?

A

Function definition

B

Function prototype

C

Function call

D

Function declaration

13

The duration for which a variable exists in memory is called its?

A

scope

B

region

C

lifetime

D

space

14

The region of a program in which a variable is accessible is known as its?

A

lifetime

B

scope

C

block

D

boundary

15

Variables declared within a block or a function are called?

A

Global variables

B

Static variables

C

External variables

D

Local variables

16

Variables declared outside of all functions are known as?

A

Local variables

B

Block variables

C

Global variables

D

Auto variables

17

What is the lifetime of a global variable?

A

Until the function in which it is declared ends

B

Until the block in which it is declared ends

C

Until the program terminates

D

Only for the duration of a loop

18

In the context of function calls, the parameters passed in the function call are known as?

A

Formal parameters

B

Dummy arguments

C

Actual parameters

D

Local parameters

19

The parameters specified in the function header are called?

A

Actual arguments

B

Global arguments

C

Calling arguments

D

Formal arguments

20

Formal arguments are also known as?

A

Actual arguments

B

Referenced arguments

C

Original arguments

D

Dummy arguments

21

What happens to a local variable when the program control moves outside the block in which it is declared?

A

It becomes global

B

Its value is saved

C

It is destroyed

D

It becomes static

22

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

A

destruction

B

definition

C

first reference

D

declaration

23

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

A

linker

B

loader

C

parser

D

compiler

24

The name of actual and formal parameters?

A

must be same

B

must be different

C

may or may not be same

D

must be in lowercase

25

Which of the following is true about a function call?

A

It stops the execution of the program

B

It transfers control to the called function

C

It transfers control to the main function

D

It resumes the execution of the program

26

Global variables are created in?

A

ROM

B

Cache

C

Hard disk

D

RAM

27

Which library contains the definition for printf() and scanf()?

A

conio.h

B

math.h

C

stdio.h

D

ctype.h

28

In C, how are arguments passed to a function by default?

A

By reference

B

By pointer

C

By value

D

By address

29

What is the maximum number of values a function can return using a single 'return' statement?

A

Two

B

One

C

As many as needed

D

Zero

30

The idea of modular programming is inspired by?

A

Software development

B

Hardware manufacturing

C

Database design

D

Network architecture

31

In a structured program, the main function primarily consists of?

A

A series of function calls

B

Countless lines of code

C

Variable declarations only

D

Looping structures

32

When an error arises in a structured program, it is best to debug?

A

The whole program

B

The main function only

C

The infected function only

D

The header files

33

The function header `void calculate()` indicates?

A

It returns an int and takes no arguments

B

It returns nothing and takes no arguments

C

It returns a void pointer

D

It has a syntax error

34

If a return type is `void`, the function body?

A

Must contain a return statement

B

Does not need a return statement

C

Must return 0

D

Must return null

35

Where are function prototypes usually placed?

A

At the end of the source file

B

Inside the main function

C

In a separate .obj file

D

At the beginning of the source file, before main()

36

When a function call is executed, control transfers to?

A

The next line in the calling function

B

The called function

C

The operating system

D

The compiler

37

The scope of a local variable starts from its point of declaration and ends at?

A

The end of the program

B

The end of the function call

C

The end of the block containing its declaration

D

The next declaration

38

The variable `chk` in the `if` block of Example 1 (page 212) has what kind of scope?

A

Global scope

B

Function scope

C

File scope

D

Block scope

39

Attempting to refer to a variable outside its scope results in a?

A

Runtime error

B

Logical error

C

Compiler error

D

Warning

40

What is the value of `nCount` printed at the end of the program in Example 2 (page 214)?

A

0

B

10

C

6

D

5

41

In the `Add(int n1, int n2)` function, `n1` and `n2` are?

A

Global variables

B

Actual parameters

C

Static variables

D

Formal parameters

42

Any change made to the value of a formal parameter ___ affect the value of the actual parameter.

A

directly

B

does not

C

always

D

might

43

A built-in function, once defined by the C standard library,?

A

can be redefined by the user

B

cannot be redefined by the user

C

must be redefined by the user

D

is an optional feature

44

In a C program, two different functions can have?

A

The same name and same parameters

B

The same name but different parameters

C

Different names but same parameters

D

Both B and C are correct

45

An unstructured program is generally ___ to debug than a structured program.

A

easier

B

the same

C

more difficult

D

faster

46

What is the purpose of the function call `clrscr()` used in the examples?

A

To calculate a result

B

To clear the output screen

C

To get input from the user

D

To print to the screen

47

In Example 3 (page 215), `Print_Asterisks()` is an example of a function that?

A

Returns a value and accepts arguments

B

Returns a value but accepts no arguments

C

Returns no value and accepts no arguments

D

Returns no value but accepts arguments

48

The main logic of the `Print_Asterisks` function is built using?

A

if-else statements

B

a switch statement

C

for and while loops

D

recursion

49

Which of the following is NOT a benefit of using functions?

A

Ensuring parallel development

B

Increasing code reusability

C

Making programs harder to understand

D

Simplifying debugging