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Representing algorithms

Representing algorithms

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Question 103

An automated vertical farming system uses an algorithm to determine how many irrigation pulses of different solutions to apply to a crop.

Figure 1 shows the algorithm written in pseudocode.

1      crop ← USERINPUT
2      IF crop = 'herbs' THEN
3          pulses ← 2
4      ELSE IF crop = 'tomatoes' THEN
5          pulses ← 6
6      ELSE IF crop = 'peppers' THEN
7          pulses ← 8
8      ELSE
9          OUTPUT 'unrecognized crop'
10     ENDIF
11     FOR j ← 1 TO pulses
12         IF j <= 2 THEN
13             IRRIGATE('water')
14         ELSE
15             IRRIGATE('nutrient_mix')
16         ENDIF
17     ENDFOR

State how many times the subroutine IRRIGATE will be called with the parameter 'nutrient_mix' if the user input is 'tomatoes' in Figure 1.

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Markscheme

Representing algorithms Questions

  1. GCSE
  2. /Computer Science
  3. /Representing algorithms

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

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