A-LevelComputer ScienceSorting AlgorithmsMay/June 2021Paper 2 Q58 Marks
A global 2D array Result of type INTEGER is used to store a list of exam candidate numbers together with their marks. The array contains 2000 elements, organised as 1000 rows and 2 columns. Column 1 contains the candidate number and column 2 contains the mark for the corresponding candidate. All elements contain valid exam result data. A procedure Sort() is needed to sort Result into ascending order of mark using an efficient bubble sort algorithm. Write pseudocode for the procedure Sort().
📋 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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