A-LevelComputer ScienceProgrammingOct/Nov 2022Paper 2 Q55 Marks
A program uses two 1D arrays of type integer. Array1 contains 600 elements and Array2 contains 200 elements. Array1 contains sample values read from a sensor. The sensor always takes three consecutive samples and all of these values are stored in Array1. A procedure Summarise() will calculate the average of three consecutive values from Array1 and write the result to Array2. This will be repeated for all values in Array1. The diagram below illustrates the process for the first six entries in Array1. Array1 10 20 15 40 41 42 Array2 15 41 Comment average of first three values average of next three values Write pseudocode for the procedure Summarise().
📋 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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