Syllabus: Computer Science
Paper 1
Computer Systems
1Data representation
2Data transmission
3Hardware
4Software
5The internet and its uses
6Automated and emerging technologies
Paper 2
Algorithms, Programming and Logic
7Algorithm design and problem-solving
8Programming
2.2 Premium
Methods of error detection
Parity checks, checksums, echo checks, check digits and automatic repeat request.
Data can be damaged on its way from one device to another. In this lesson you learn how a computer notices that something went wrong, and what it does next.
You will meet the five methods that appear in the exam: parity checks, checksums, echo checks, check digits and automatic repeat request.
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