A-LevelComputer ScienceAlgorithm Design and Problem SolvingOct/Nov 2022Paper 2 Q35 Marks
An algorithm is needed to process a sequence of numbers. Numbers may be positive or negative and may be integer or decimal. The algorithm will: • prompt and input one number at a time until the value zero is input • sum the negative numbers • sum the positive numbers • when zero is input, output the two sum values and then end. Describe the algorithm needed. Do not include pseudocode statements in your answer.
📋 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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