Exam-style question
Try this first
Which statement correctly describes lossless compression?.
- A.The original data can be reconstructed exactly after decompression
- B.Some data is permanently removed to make the file smaller
- C.It can only be used with sound files
- D.It always produces a larger file than lossy compression
Model answer
What a good answer should say
- The original data can be reconstructed exactly after decompression
Explanation
Why this works
Lossless compression preserves all the original data, so decompression can recreate the original file exactly.
Common mistake
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