Exam-style question
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What is a disadvantage of lossy compression?.
- A.It may permanently remove some data and reduce quality
- B.It cannot reduce the size of a file
- C.It always allows exact reconstruction of the original file
- D.It can only be applied to text files
Model answer
What a good answer should say
- It may permanently remove some data and reduce quality
Explanation
Why this works
Lossy compression removes some data permanently. This can produce a smaller file, but the quality may be reduced and the original cannot be reconstructed exactly.
Common mistake
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