A-LevelComputer ScienceData StructuresOct/Nov 2024Paper 4 Q229 Marks
A linear queue data structure is designed using a record structure. The record structure Queue has the following fields: • QueueArray, a 1D array of up to 100 integer values • Headpointer, a variable that stores the index of the first data item in QueueArray • Tailpointer, a variable that stores the index of the next free location in QueueArray.
📋 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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