Computer 9th Chap 3 : Topic 4.3 - Maryam Publications

Computer Chapter 3 : Topic 4.3

Sequence, Selection and Repetition in JavaScript

1 / 15

Which programming concept ensures that JavaScript code runs step-by-step in a fixed order without skipping any instruction?

A) Repetition

B) Sequence

C) Selection

D) Compilation

2 / 15

Which structure in JavaScript is mainly used when decisions must be made based on a condition?

A) Sequence

B) Repetition

C) Function

D) Selection

3 / 15

Which structure is responsible for executing a block of code multiple times in JavaScript?

A) Repetition

B) Selection

C) Declaration

D) Sequence

4 / 15

What is the correct order of basic algorithm structures used in programming logic?

A) Selection, Sequence, Function

B) Selection, Repetition, Sequence

C) Sequence, Selection, Repetition

D) Repetition, Sequence, Selection

5 / 15

Which JavaScript statement is an example of selection structure?

A) variable declaration

B) if statement

C) console.log

D) for loop

6 / 15

Which JavaScript loop is best used when the number of repetitions is unknown?

A) switch statement

B) if statement

C) while loop

D) for loop

7 / 15

What is the main purpose of a for loop in JavaScript algorithms?

A) To execute code a fixed number of times

B) To declare variables only

C) To make decisions

D) To stop program execution

8 / 15

Which statement best describes how selection differs from sequence?

A) Selection executes code randomly

B) Sequence runs code step-by-step without conditions, selection uses conditions

C) Both are identical

D) Sequence makes decisions, selection does not

9 / 15

What happens if a repetition condition in a loop never becomes false?

A) Selection structure activates

B) Program stops automatically

C) Variables are deleted

D) Infinite loop occurs

10 / 15

Which of the following is NOT part of basic programming control structures?

A) Selection

B) Encryption

C) Sequence

D) Repetition

11 / 15

In JavaScript, what is the role of an else statement in selection?

A) To execute alternative code when condition is false

B) To end the program

C) To repeat code

D) To create a loop

12 / 15

Which loop ensures that code executes at least once before checking condition?

A) while loop

B) if loop

C) do...while loop

D) for loop

13 / 15

What is the main advantage of using repetition in JavaScript algorithms?

A) It removes variables

B) It stops execution faster

C) It reduces decision-making ability

D) It avoids writing the same code again and again

14 / 15

Which of the following best represents sequence in a real-life example?

A) Choosing between tea or coffee

B) Checking password validity

C) Repeating exercise daily

D) Washing hands → drying hands → eating food

15 / 15

What is the result of incorrect use of selection in a JavaScript program?

A) Code becomes shorter automatically

B) Program always runs faster

C) Program may produce wrong decisions or outputs

D) Loop stops working completely

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