O-LevelComputer ScienceAlgorithm design and problem-solving2210/22 · May/June 2019 · Q34 Marks
This flowchart inputs the marks gained in an examination. An input of –1 ends the routine. [Flowchart Diagram] Complete the trace table for the mark input data: 50, 70, 65, 30, 95, 50, 55, 85, 65, 35, −1, 45
- Total | Count | Distinction | Mark | OUTPUT ------|-------|-------------|------|-------------------------- 0 | 0 | 0 | 50 | | | | 70 | | | | 65 | | | | 30 | | | | 95 | | | | 50 | | | | 55 | | | | 85 | | | | 65 | | | | 35 | | | | −1 | | | | 45 |[4]
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Mark scheme
Marking points from the official mark scheme (May/June 2019). The mark or mark type is shown in brackets.
- [4] 1 mark for Total and Count columns both correct.
- [4] 1 mark for each correct column apart from Total and Count.
- [4] If no marks awarded allow 1 mark for initialisation of Total, Count and Distinction, set to zero.
- [4] (Table with correct values showing trace and output) Total | Count | Distinction | Mark | OUTPUT ------|-------|-------------|------|-------------------------- 0 | 0 | 0 | 50 | 50 | 1 | 0 | 70 | 120 | 2 | 0 | 65 | 185 | 3 | 0 | 30 | 215 | 4 | 0 | 95 | 310 | 5 | 1 | 50 | 360 | 6 | 1 | 55 | 415 | 7 | 1 | 85 | 500 | 8 | 2 | 65 | 565 | 9 | 2 | 35 | 600 | 10 | -1 | | Number of Distinctions 2 | | | | Average Mark 60
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