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A-LevelComputer ScienceSubroutinesMay/June 2021Paper 2 Q68 Marks

A procedure CountVowels () will: • be called with a string containing alphanumeric characters as its parameter • count and output the number of occurrences of each vowel (a, e, i, o, u) in the string • count and output the number of occurrences of the other alphabetic characters (as a single total). The string may contain both upper and lower case characters. Each count value will be stored in a unique element of a global 1D array CharCount of type INTEGER. The array will contain six elements. Write pseudocode for the procedure CountVowels().

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Computer Science Question

Topic

This structured question tests Subroutines in A-Level Computer Science (syllabus code 9618). It is worth 8 marks.

Source

This question appeared in the Cambridge A-Level Computer Science May/June 2021 examination, Paper 2 Variant 2.

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