Do-While Loop Quiz

What is required at the end of the do-while loop condition?

• A colon (:)

• A comma (,)

• A semicolon (;)

• A period (.)

Answer explanation

In a do-while loop, the condition is followed by a semicolon (;). This indicates the end of the loop statement. Therefore, the correct answer is a semicolon (;).

In a do-while loop, when is the condition checked?

• Before the loop starts

• After the loop has executed once

• At the beginning of each iteration

• It is not checked

Answer explanation

In a do-while loop, the condition is checked after the loop has executed once. This ensures that the loop runs at least one time before evaluating the condition, making 'After the loop has executed once' the correct choice.

Which of the following is true about the do-while loop?

• It may never execute the loop body

• It always executes the loop body at least once

• It executes the loop body only if the condition is true initially

• It executes the loop body indefinitely

Answer explanation

The correct choice is that a do-while loop always executes the loop body at least once, regardless of the condition. This is because the condition is checked after the loop body has executed.

In the flowchart of a do-while loop, what happens if the condition is false?

• The loop continues

• The loop terminates

• The loop restarts

• The loop skips an iteration

Answer explanation

In a do-while loop, the condition is checked after the loop's body executes. If the condition is false, the loop terminates, meaning it will not execute again. Thus, the correct answer is that the loop terminates.

What must follow the condition in a do-while loop?

• A colon :

• A comma ,

• A semicolon ;

• A period .

Answer explanation

In a do-while loop, the condition is followed by a semicolon (;). This indicates the end of the loop statement, allowing the loop to execute at least once before checking the condition.

Which of the following is true about the do-while loop?

• It never executes the loop body

• It executes the loop body only if the condition is false

• It executes the loop body at least once

• It executes the loop body only if the condition is true

Answer explanation

The correct choice is 'It executes the loop body at least once' because a do-while loop guarantees that the loop body runs before the condition is evaluated, ensuring at least one execution regardless of the condition's truth value.

Which symbol is used to denote the end of the condition in a do-while loop?

• :

• ;

• ,

• .

Answer explanation

In a do-while loop, the condition is followed by a semicolon (;) to denote its end. This is essential for the correct syntax, distinguishing it from other symbols like colon (:), comma (,), or period (.).

What is the purpose of the program in the provided code?

• To calculate the sum of three numbers

• To find the maximum of three scores

• To average three test scores

• To sort three numbers

Answer explanation

The program calculates the average of three test scores by summing them and dividing by three, making 'To average three test scores' the correct choice.

Which loop structure is used in the program?

• For loop

• While loop

• Do-while loop

• Infinite loop

Answer explanation

The correct choice is the 'Do-while loop' because it executes the loop body at least once before checking the condition, ensuring that the code inside the loop runs before any condition is evaluated.

What is the purpose of using a do-while loop in a menu-driven program?

• To exit the program immediately

• To bring the user back to the menu to make another choice

• To process user input without any conditions

• To simplify the code structure

Answer explanation

A do-while loop allows the program to repeatedly display the menu and process user choices until the user decides to exit. This ensures that users can make multiple selections without restarting the program.