O-LevelComputer ScienceProgramming2210/21 · May/June 2015 · Q24 Marks

Read this section of program code that should input 10 positive numbers and then output the smallest number input. 1 Small = 0 2 Counter = 0 3 REPEAT 4 INPUT Num 5 IF Num < Small THEN Num = Small 6 Counter = Counter + 1 7 PRINT Small 8 UNTIL Counter < 10 There are four errors in this code. Locate these errors and suggest a corrected piece of code for each error.

Mark scheme

Marking points from the official mark scheme (May/June 2015). The mark or mark type is shown in brackets.

[1] 1 mark for each error identified + suggested correction Line 1 or Small = 0: this should read Small = 999
[1] line 5 or IF...: this should read IF Num < Small THEN Small = Num
[1] line 8 or UNTIL: this should read UNTIL Counter = 10 or UNTIL Counter > = 10 or UNTIL Counter > 9
[1] line 7 or PRINT...: PRINT Small should come after the end of the repeat loop or line 8 or UNTIL: this should come before line 7

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Topic: Programming, O-Level Computer Science (syllabus 2210). Structured question, 4 marks.
Source: O-Level Computer Science, May/June 2015 Paper 2 Variant 1, question 2.

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