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Which statement correctly describes a feature of lossless compression?

easy🧠 Conceptual Q2 of Q15
Intro to Computing - How Data is Represented
Which statement correctly describes a feature of lossless compression?
AThe original data can be perfectly reconstructed after decompression
BSome data is permanently removed to reduce file size
CIt is mainly used for compressing images and videos with quality loss
DIt always achieves higher compression ratios than lossy methods
Step-by-Step Solution
Solution:

  1. Step 1: Define lossless compression

    Lossless compression allows exact recovery of original data after decompression.

  2. Step 2: Evaluate options

    The original data can be perfectly reconstructed after decompression states perfect reconstruction, which is true for lossless methods.

  3. Final Answer:

    The original data can be perfectly reconstructed after decompression -> Option A

  4. Quick Check:

    Lossless means no data loss [OK]
Quick Trick: Lossless means no data is lost [OK]
Common Mistakes:
MISTAKES
  • Confusing lossless with lossy compression
  • Believing lossless always compresses better than lossy
  • Thinking lossless removes data permanently

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