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Oak ComputingTest · Computing

Compression ratios

The starter and exit quiz of the lesson “Compression ratios”, from the unit “Data compression” (Year 10 Computing) by Oak National Academy.

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Oak National Academy

12 questions

  1. What is the main characteristic of lossy data compression?
  2. Which of the following is true about lossless compression?
  3. What is the effect of lossy compression on quality?
  4. How does lossy compression affect file size?
  5. What type of compression does the JPEG format use?
  6. What type of compression does the PNG format use?
  7. Match each term to its impact.
  8. What is a potential downside of a higher compression ratio?
  9. Which factors should be considered when choosing a compression algorithm?
  10. What happens to a file size with a higher compression ratio?
  11. Match each term to its definition.
  12. Does a higher compression ratio always mean better quality?

License: OGL

Compression ratios · Examplary