Data Compression and Data Retrieval MCQs with answers Page - 6

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Q. Disadvantages of data compression

  • (A) The rate of input – output operations in a computing device can be greatly increased due to shorter presentation of data.
  • (B) Compressed, sensitive data transmitted through a noisy communication channel is risky because the burst errors introduced by the noisy channel can destroy the transmitted data.
  • (C) ---
  • (D) ---

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Q. Example of entropy based compression is

  • (A) RLE , Arithmetic , Huffman
  • (B) Lempel-Ziv , Arithmetic
  • (C) ---
  • (D) ---

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Q. Example of dictionary based compression is

  • (A) RLE , Arithmetic , Huffman
  • (B) Lempel-Ziv
  • (C) ---
  • (D) ---

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Q. Huffman coding is to find a way to compress the storage of data using

  • (A) Data Length Codes.
  • (B) Variable Length Codes.
  • (C) ---
  • (D) ---

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Q. The lempel ziv algorithm is an algorithm for

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

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Q. Regardless of the length of the phrase, every LZSS pointer is of

  • (A) Different Size
  • (B) Same Size
  • (C) ---
  • (D) ---

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Q. The decompression in LZ78 Is __compared to the process of compression.

  • (A) Slower
  • (B) Faster
  • (C) ---
  • (D) ---

A

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Q. In arithmetic coding a ___identifier or tag is generated for the sequence to be encoded.

  • (A) Unique
  • (B) Different
  • (C) ---
  • (D) ---

A

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Q. In file compression—unix once the dictionary has filled up, the size of the dictionary is ____to 1024 entries.

  • (A) Single
  • (B) Doubled
  • (C) ---
  • (D) ---

A

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Q. GIF has become quite popular for encoding all kinds of images, both computergenerated and “___” images.

  • (A) Distorted
  • (B) Natural
  • (C) ---
  • (D) ---

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