O-LevelComputer ScienceAlgorithm design and problem-solving2210/22 · May/June 2021 · Q54 Marks
5 A one-dimensional array dataArray[1:20] needs each element set to zero.
- (a)Write a pseudocode routine that sets each element to zero. Use the most suitable loop structure.[3]
- (b)Explain why you chose this loop structure.[1]
Mark scheme
Marking points from the official mark scheme (May/June 2021). The mark or mark type is shown in brackets.
- [1] Use of FOR loop
- [1] Working loop with correct number of Iterations
- [1] Correct assignment
- [1] FOR Count ← 1 TO 20
- [1] dataArray[Count] ← 0
- [1] NEXT (Count)
- [1] (A FOR loop has) a fixed number of repetitions //
- [1] No need to manage the loop counter //
- [1] no need to use another variable for the array index
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