A-LevelComputer ScienceSystem Software and MethodologiesOct/Nov 2023Paper 2 Q75 Marks
7 An algorithm is represented by a state-transition diagram. The table shows the inputs, outputs and states for the algorithm: Current state | Input | Output | Next state --------------|-------|--------|----------- S1 | A1 | X1 | S2 S2 | A3 | none | S1 S2 | A2 | X4 | S5 S5 | A1 | X1 | S5 S5 | A4 | X2 | S2 S5 | A3 | none | S3 S1 | A9 | X9 | S3 S3 | A9 | X9 | S4 Complete the state-transition diagram to represent the information given in the table. A1|X1 START S1 A3
📋 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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