A-LevelComputer ScienceFunctions and ProceduresOct/Nov 2023Paper 2 Q66 Marks
A function TestNum() will take a six-digit string as a parameter. The function will test whether the string meets certain conditions and will return an integer value as follows: Return value | Condition | Example -------------|----------------------------------------------|---------- 1 | The last three digits are the same but non-zero. | "253444" 2 | The last three digits are zero. | "253000" 3 | The first three and last three digits are the same. | "410410" The function will return the highest possible value for the given string. If the string does not meet any of the conditions, zero is returned.
📋 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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