Cambridge IGCSE Computer Science
2.2Methods of error detection
Methods of error detection in Cambridge IGCSE Computer Science: what the syllabus expects you to know, the learning objectives and how to practise.
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Learning objectives
What the syllabus expects you to be able to do.
- 2.2.1Explain why data is checked for errors after transmission and how errors occur.
- 2.2.2Describe parity checks (odd and even, parity byte and parity block), checksums and echo checks.
- 2.2.3Describe how a check digit detects data-entry errors, with examples such as ISBNs and bar codes.
- 2.2.4Describe how an automatic repeat query uses acknowledgements and timeouts.
Lessons
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Error detection: parity, checksums, echo checks, check digits and ARQ
40 min
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Sample question
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