O-LevelComputer ScienceProgramming2210/21 · May/June 2016 · Q26 Marks

Read this section of program code that inputs 10 positive numbers and then outputs the smallest number input. 1 Small = 1000 2 Counter = 0 3 REPEAT 4 INPUT Num 5 IF Num < Small THEN Small = Num 6 Counter = Counter + 1 7 UNTIL Counter = 10 8 PRINT Small

(i)Identify three changes you would need to make to find the largest number input instead of the smallest number.[3]
(ii)Rewrite the program code with your changes.[3]

Mark scheme

Marking points from the official mark scheme (May/June 2016). The mark or mark type is shown in brackets.

[3] (i) 1 mark for each change Change variable name in every instance as needs to be meaningful e.g. Large Set this variable to a low value line 5: change comparison from < to >
[3] (ii) 3 marks maximum, 1 mark for each change correctly included. 1 Large = 0 2 Counter = 0 3 REPEAT 4 INPUT Num 5 IF Num > Large THEN Large = Num 6 Counter = Counter + 1 7 UNTIL Counter = 10 8 PRINT Large

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Topic: Programming, O-Level Computer Science (syllabus 2210). Structured question, 6 marks.
Source: O-Level Computer Science, May/June 2016 Paper 2 Variant 1, question 2.

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