Data Compression

§3.3.8Foundation and Higher tierAQA GCSE Computer Science (8525)

Data Compression is one of 8 subtopics in Data Representation, part of AQA GCSE Computer Science (specification §3.3.8). Examiners can ask about 3 named concepts here, from Why Compress Data? to Run Length Encoding (RLE). Inside the app, this subtopic can be practised directly: exam-format questions, AI-marked against the official mark scheme.

Concepts you need to know

The named concepts the 8525 specification examines in this subtopic. The full what-to-know, how-to-get-top-marks and examiner-expectations breakdown for each lives inside the app.

Why Compress Data?Huffman CodingRun Length Encoding (RLE)

Other subtopics in Data Representation

Number Bases Converting Between Number Bases Units of Information Binary Arithmetic Character Encoding Representing Images Representing Sound

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