O-LevelComputer ScienceProgrammingOct/Nov 2024Paper 2 Q69 Marks
An incomplete algorithm has been written in pseudocode to count the number of values stored in an array and to find their average. Values have been stored in the array starting at A[1] All the values to be counted are non-zero. A value of zero in the array indicates there are no more values stored. 01 DECLARE A : ARRAY[1:50] OF INTEGER 02 DECLARE C : INTEGER 03 DECLARE W : INTEGER 04 DECLARE X : INTEGER 05 W ← 0 06 C ← 07 WHILE A[C] <> 0 08 09 C ← C + 1 10 ENDWHILE 11 X ←
📋 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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