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A-LevelComputer ScienceData Communication and NetworkingOct/Nov 2025Paper 1 Q12 Marks

Draw one line from each verification method to indicate whether it is used during data transfer or data entry. Verification Method Parity byte check Checksum Visual check Parity block check Use Data transfer Data entry

Q: What topic does this question test?

This question tests Data Communication and Networking in A-Level Computer Science (syllabus code 9618). It is worth 2 marks.

📋 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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About This A-Level Computer Science Question

Topic

This structured question tests Data Communication and Networking in A-Level Computer Science (syllabus code 9618). It is worth 2 marks.

Source

This question appeared in the Cambridge A-Level Computer Science Oct/Nov 2025 examination, Paper 1 Variant 2.

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