Data Compression and Data Retrieval MCQ Questions with answers and solutions Page 1

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

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

💬 Discuss

✅ Correct Answer: (A) Lossy Compression

Published by Mr. Dubey ⭐ 109.99K Points at 14-Jun-2020 11:59 am in Data Compression and Data Retrieval

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) ---

💬 Discuss

✅ Correct Answer: (A) The file size becomes significantly (much) smaller

Published by Mr. Dubey ⭐ 109.99K Points at 14-Jun-2020 11:59 am in Data Compression and Data Retrieval

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

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

💬 Discuss

✅ Correct Answer: (D) Text

Published by Mr. Dubey ⭐ 109.99K Points at 14-Jun-2020 11:59 am in Data Compression and Data Retrieval

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

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

💬 Discuss

✅ Correct Answer: (A) Lossless compression

Published by Mr. Dubey ⭐ 109.99K Points at 14-Jun-2020 11:59 am in Data Compression and Data Retrieval

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

💬 Discuss

✅ Correct Answer: (D) A and b

Published by Mr. Dubey ⭐ 109.99K Points at 14-Jun-2020 11:59 am in Data Compression and Data Retrieval

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

💬 Discuss

✅ Correct Answer: (D) a and c

Published by Mr. Dubey ⭐ 109.99K Points at 14-Jun-2020 11:59 am in Data Compression and Data Retrieval

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

💬 Discuss

✅ Correct Answer: (D) all of the above

Published by Mr. Dubey ⭐ 109.99K Points at 14-Jun-2020 11:59 am in Data Compression and Data Retrieval

Q. Dictionary based compression...

(A) Is a lossless compression format
(B) Doesn't need to send the dictionary with the data
(C) Is a lossless compression format
(D) all of the above

💬 Discuss

✅ Correct Answer: (D) all of the above

Published by Mr. Dubey ⭐ 109.99K Points at 14-Jun-2020 11:59 am in Data Compression and Data Retrieval

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

💬 Discuss

✅ Correct Answer: (D) all of the above

Published by Mr. Dubey ⭐ 109.99K Points at 14-Jun-2020 11:59 am in Data Compression and Data Retrieval

Q. Hashing gives each item

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

💬 Discuss

✅ Correct Answer: (D) A unique address

Published by Mr. Dubey ⭐ 109.99K Points at 14-Jun-2020 11:59 am in Data Compression and Data Retrieval

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