Cambridge IGCSE Computer Science
1.3Data storage and compression
Data storage and compression in Cambridge IGCSE Computer Science: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic52 practice questions3 lessons
Learning objectives
What the syllabus expects you to be able to do.
- 1.3.1Use the units of data storage from the bit to the exbibyte, with 1024 between units.
- 1.3.2Calculate the file size of an image file and a sound file from given information.
- 1.3.3Explain the purpose of and need for data compression.
- 1.3.4Explain how lossy and lossless compression (including run-length encoding) reduce file size.
Lessons
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Calculating image and sound file sizes
35 min
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Data compression: lossy and lossless
30 min
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Units of data storage
25 min
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Sample question
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