computer MCQs - 10th class Chapter 03 Mcqs

1

Which statements help decide the next statements to be executed based on a condition?

A

Sequential Statements

B

Selection Statements

C

Repetition Statements

D

Assignment Statements

2

What is the default control structure in the C language?

A

Selection control

B

Repetition control

C

Sequential control

D

Nested control

3

In an 'if' statement, the code gets executed only if the condition is what?

A

False

B

Zero

C

True

D

Negative

4

The condition inside an 'if' statement is enclosed in which symbols?

A

{}

B

[]

C

nan

D

()

5

A condition in an 'if' statement can be which type of expression?

A

Arithmetic

B

Relational

C

Logical

D

All of the above

6

In C, any expression that evaluates to a non-zero value is considered what?

A

False

B

Void

C

Error

D

True

7

An expression that evaluates to zero is considered what?

A

True

B

False

C

Null

D

Syntax Error

8

Which of the following expressions evaluates to 'true'?

A

5 == 4

B

5 - 5

C

5 > 4

D

(5 > 4) && (10 < 9)

9

For associating multiple statements with an 'if', they must be enclosed in what?

A

()

B

<>

C

{}

D

[]

10

What happens if the condition 'a > b' is false in the code: if (a > b) printf("A"); printf("B");?

A

Only A is printed

B

Only B is printed

C

Both A and B are printed

D

Nothing is printed

11

Which statement is used to execute a block of code if a condition is true and another block if it is false?

A

if statement

B

switch statement

C

if-else statement

D

nested if statement

12

An 'else' statement must be associated with which statement?

A

printf

B

main

C

if

D

switch

13

A set of multiple instructions enclosed in braces is called a?

A

Function

B

Array

C

Loop

D

Block or Compound Statement

14

The 'if-else-if' statement is also known as what?

A

if-else loop

B

if-else ladder

C

if-else chain

D

if-else switch

15

Conditional statements within other conditional statements are called what?

A

Complex structures

B

Parallel structures

C

Nested selection structures

D

Layered structures

16

In the expression 'if (condition)', what is 'if'?

A

A variable

B

A function

C

A keyword

D

A data type

17

Which operator is used for logical AND in C?

A

&

B

AND

C

&&

D

|

18

Which operator is used to check for equality?

A

0

B

0

C

-=

D

!=

19

What is the purpose of conditional logic in programming?

A

To repeat code

B

To make decisions

C

To store data

D

To declare variables

20

If percentage is 65, what grade is assigned by the code: if (p>=80) G='A'; else if (p>=70) G='B'; else if (p>=60) G='C';?

A

B

C

D

21

A flow chart uses a diamond shape to represent what?

A

Input/Output

B

Process

C

Start/Stop

D

Decision/Condition

22

In C, what does the expression '5 % 2 == 0' evaluate to?

A

True

B

False

C

1

D

Error

23

An 'if' statement inside another 'if' statement is an example of a _____ structure.

A

nested

B

boxed

C

repeated

D

decomposed

24

The code associated with an 'if' statement is executed when the condition is true. Otherwise...

A

the program crashes

B

the associated code does not get executed

C

the compiler skips the entire program

D

an error is generated

25

Which header file is typically required for 'printf' and 'scanf' functions?

A

<conio.h>

B

<math.h>

C

<string.h>

D

<stdio.h>

26

What does the '!' operator do in a logical expression?

A

Logical AND

B

Logical OR

C

Logical NOT

D

Logical XOR

27

In an 'if-else-if' ladder, when is the final 'else' block executed?

A

Always

B

When the first 'if' is true

C

When all preceding conditions are false

D

When all preceding conditions are true

28

For a home user consuming 300 units of electricity, what is the unit price according to the PDF?

A

Rs 12

B

Rs 15

C

Rs 20

D

Rs 24

29

For a commercial user consuming 500 units of electricity, what is the unit price according to the PDF?

A

Rs 15

B

Rs 20

C

Rs 24

D

Rs 12

30

What is a 'compound statement'?

A

A statement with a condition

B

A statement that calls a function

C

Multiple statements enclosed in braces {}

D

A statement that declares a variable

31

If 'int a=15;', the condition 'a % 2 == 0' evaluates to what?

A

True

B

False

C

15

D

0

32

Which statement is NOT a type of control statement in C?

A

Sequential Control

B

Selection Control

C

Variable Control

D

Repetition Control

33

What is the primary function of a selection statement?

A

To repeat a set of instructions

B

To execute statements in sequence

C

To decide which statements to execute next

D

To stop the program

34

If you want to check if a character 'ch' is a digit, which condition can be used?

A

ch >= 0 && ch <= 9

B

ch >= '0' && ch <= '9'

C

ch == 'digit'

D

ch.isDigit()

35

What is the potential issue if you have multiple statements under an 'if' but do not use braces {} before an 'else'?

A

Slower execution

B

The code runs fine

C

Compiler error

D

Wasted memory

36

In the problem to find the largest of three numbers (n1, n2, n3), which condition checks if n1 is the largest?

A

n1 > n2 || n1 > n3

B

n1 > n2 && n1 > n3

C

n1 == n2 && n1 == n3

D

n1 < n2 && n1 < n3

37

A condition can be any valid expression EXCEPT?

A

Arithmetic

B

Relational

C

Declaration

D

Logical

38

Which of the following is a relational expression?

A

a + b

B

a && b

C

a > b

D

a = 5

39

In a flow chart, a rectangle is used to represent what?

A

Condition

B

Input/Output

C

Process

D

Connector

40

To get a bonus of Rs. 10000, what conditions must be met according to 'Programming Time 3.2'?

A

items_sold > 100

B

items_broken == 0

C

items_sold > 100 && items_broken == 0

D

items_sold > 100 || items_broken == 0

41

The structure where the program flow is a straight line, executing one statement after another, is called?

A

Selection

B

Sequential

C

Repetition

D

Branching

42

What does 'a % c == 0' check?

A

If c is a factor of a

B

If a is a factor of c

C

If a and c are equal

D

If a multiplied by c is 0

43

If a student's percentage is 49.9, what grade will they receive based on the logic in the PDF?

A

D

B

F

C

D

Error

44

In C, 'if' is a...

A

Reserved word/Keyword

B

User-defined function

C

Standard library

D

Variable

45

The statements that control the flow of execution of a program are called?

A

Flow statements

B

Control statements

C

Execution statements

D

Logic statements

46

In 'if (a > b)', 'a > b' is the?

A

Code

B

Keyword

C

Condition

D

Statement

47

What is the correct syntax for an 'if' statement in C?

A

if {condition} ()

B

if condition {}

C

if (condition) {}

D

if [condition] {}

48

The 'else' part of an 'if-else' statement is?

A

Mandatory

B

Optional

C

Required for compilation

D

Used to start a program

49

What is the output of: int x=5; if (x==5) printf("A"); else printf("B");?

A

B

C

AB

D

No output