Chapter 11 Computer science AS LEVEL

What is the purpose of a loop in programming?

• To execute a block of code once

• To stop the execution of a program

• To repeat a block of code multiple times

• To store multiple values

In pseudocode, indentation is optional and has no impact on the logic.

• True
• False

What is the output of the following pseudocode

x ← 5

y ← 2

OUTPUT x MOD y

• 1

• 2

• 4

• 3.5

How do you open a file for reading in pseudocode?

• data = OPENFILE("data.txt", "READ")

• OPENFILE "data.txt" FOR READ

• FILE data = READ "data.txt"

• OPEN "data.txt" AS READ

What will the pseudocode output?

num ← 4

IF num > 2 AND num < 6 THEN

    OUTPUT "Valid"

ELSE

    OUTPUT "Invalid"

ENDIF

• Valid

• Error

• Invalid

• 4

What happens in a REPEAT UNTIL loop?

• The loop only runs if the condition is true

• The loop works like a FOR loop

• The loop never runs

• The loop runs at least once before checking the condition

What is the purpose of a PROCEDURE in pseudocode?

• It is used for loops

• It replaces a variable

• It performs a task but does not return a value

• nothing

What is the correct way to assign a value to a variable in pseudocode?

• x <- 10

• x is 10

• x = 10

• DECLARE x = 10

the symbol used to assign in pseudocode is <-

• True
• False

A REPEAT UNTIL loop always executes at least once.

• True
• False