Data Compression and Data Retrieval MCQs with answers Page - 1

Here, you will find a collection of MCQ questions on Data Compression and Data Retrieval. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. Makes the file smaller by deleting parts of the file permanently (forever)

  • (A) Lossy Compression
  • (B) Lossless Compression
  • (C) ---
  • (D) ---

A

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Q. Which of these is an advantage for Lossy compression?

  • (A) The file size becomes significantly (much) smaller
  • (B) The file size does not become much smaller than 50%
  • (C) ---
  • (D) ---

A

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Q. Which of the following would not be suitable for Lossy Compression?

  • (A) Images
  • (B) Sounds
  • (C) Videos
  • (D) Text

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Q. What type of compression allows you to reconstruct the original data?

  • (A) Lossless compression
  • (B) Lossy compression
  • (C) ---
  • (D) ---

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Q. What are the key reasons for compressing data?

  • (A) Less space needed for storage
  • (B) Less time to transmit
  • (C) Reduced amount of processing power
  • (D) A and b

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Q. Lossless compression...

  • (A) Is used when not all the information is needed
  • (B) Would be a sensible choice for a music download site
  • (C) Can fully regenerate the original file
  • (D) a and c

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Q. Lossy compression...

  • (A) Permanently removes data from a file
  • (B) Aims to remove redundant data
  • (C) Would be a sensible choice for a music download site.
  • (D) all of the above

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Q. Run-length encoding..

  • (A) Is Lossless
  • (B) Records the number of repeats of an individual element
  • (C) Can be used for a wide variety of file types
  • (D) all of the above

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Q. Hashing gives each item

  • (A) A sequential address
  • (B) A logarithmic address
  • (C) No address
  • (D) A unique address

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Q. When is Run Length Encoding used?

  • (A) When we want to compress patterns of data
  • (B) When we want to decompress patterns of data
  • (C) When we want to encode running videos
  • (D) Option.

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