Data Representation - Compression (GCSE Computing)

The following is a GCSE Computing test covering 'Data Representation - Compression'

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Question 1

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Which of these file types commonly uses lossy compression for audio?

Reducing bits per pixel (colour depth) in an image will typically do what?

Which of the following is an example of a lossy video codec family often used for streaming and storage?

Which of the following is an example of lossy compression for images?

If an 8000-byte file is compressed with a ratio of 4:1, what is the compressed file size?

What is an advantage of lossless compression?

If a 10 MB file compresses to 2 MB, what is the compression ratio?

Which statement best describes the trade-off in lossy compression?

Which type of data is typically the hardest to compress?

Which metric is most useful for comparing how effective two compression methods are?

Which image format commonly uses lossless compression and is popular on the web?

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