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Question 24

An automated irrigation system uses the algorithm shown in Figure 1 to decide how much water to dispense based on a moisture sensor input.

Figure 1

1      moisture ← USERINPUT
2      IF moisture < 20 THEN
3          cycles ← 5
4      ELSE IF moisture < 50 THEN
5          cycles ← 2
6      ELSE
7          cycles ← 0
8          OUTPUT 'No water needed'
9      ENDIF
10     WHILE cycles > 0
11         DISPENSE_WATER('100ml')
12         cycles ← cycles - 1
13     ENDWHILE

Select the option that shows the line number where iteration is first used in the algorithm.

A

Line number 2

B

Line number 4

C

Line number 10

D

Line number 11

Markscheme

Programming concepts Questions

  1. GCSE
  2. /Computer Science
  3. /Programming concepts

298 exam-style questions on AQA GCSE Computer Science Programming concepts. Each one has a worked solution and a mark scheme showing where the marks go.

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