# Data Compression MCQ Set-3 | AKTU

Data Compression Multiple Choice Based Question With Answers aktu. Regarding Any Errors related to the question or its solutions please comment in the given below, our team will check, and improve.

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## Data Compression Online MCQ Test

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## Data Compression Aktu MCQ For Practice

#### 1. The purpose of data compression is to decrease file sizes .

A. True

B. False

2. Digitizing the image intensity amplitude is called

A. sampling

B. quantization

C.framing

D. Both A and B

3. An image transmitted using a wireless network

A. corrupted as a result of lighting or other atmospheric

B. non-corrupted as a result of lighting or other atmospheric

C. corrupted as a result of pixel

D. none of above

4. What is an image

A. Matrix of pixel

B. Picture

C. Collection of pixel

D. All of these

5. Point out the wrong

A. You can enable or disable ROW or PAGE compression in an online state only

B. Non–leaf-level pages do not receive page compression

C. When you are compressing indexes, leaf-level pages can be compressed with both row and page compression

D. None of the mentioned

6. In dictionary techniques for data compaction, which approach of building dictionary is used for the prior knowledge of the probability of the frequently occurring patterns?

A. Static dictionary

C. Both

D. None of the above

7. If the probability of encountering a pattern from the dictionary is p, then the average number of bits per pattern R is given by

A. R=9-p

B. R=21-12p

C. R=21-p

D. R=12-p

8. Static dictionary___

A. permanent

B. sometimes allowing the addition of strings but no deletions

C. allowing for additions and deletions of strings as new input symbols are being read

D. Both (A) and (B)

9. Adaptive dictionary ___

A. holding strings previously found in the input stream

B. sometimes allowing the addition of strings but no deletions

C. allowing for additions and deletions of strings as new input symbols are being read

D. Both (A) and (C)

10. LZ77 and LZ78 are the two algorithms published in papers by Abraham Lempel and Jacob Ziv in 1977 and 1978

A. Lossless data compression

B. Lossy data compression

C. Both

D. None of the above

12. Which is the image processing technique used to improve the quality of images for human viewing?

A. compression

B. restoration

C. enhancement

D. analysis

13. The best visual compression quality is achieved using

A. Wavelets

B. Fourier transform

C. DCT

D. Dolby

15. Without losing quality, JPEG-2000 can achieve compression ratios of

A. 2:1

B. 20:1

C. 200:1

D. 2000:1

16. In a typical picture, most pixels will be

A. very different to their neighbors

B. equal

C. bright

D. very similar to their neighbors

18. Deflate = ____

A. LZW + Huffman

B. LZ77 + Huffman

C. LZ78 + Huffman

D. None of these

19. Full form of GIF

A. Graphics Interchange Format

B. Graphics Interchange Form

C. Graphics Inter Format

D. Graphics Interact Format

20. LZ78 has _____ compression but very _____ decompression than

A. fast, slow

B. slow, fast

C. medium, high

D. None of these

21. Compression packages that use an LZ77-based algorithm followed by a variable-length coder.

A. PKZip

B. Zip

C. PNG

D. All of the above

22. Relatively Quadtrees raster data compression technique provides:

A. High compression

B. No compression

C. Less compression

D. Maximum compression

23. JPG image format is also a type of:

A. Destructive compression tool

B. Constructive compression tool

C. Simple compression tool

D. None of the above

24. For which of the following cases Dimensional reduction may be used?

A. Data Compression

B. Data Visualization

C. To prevent overfitting

D. Both A and B

25. Which type of method is used is used to compress data made up of a combination of symbols?

A. Huffman encoding

B. Run- length encoding

C. Lempel Ziv encoding

D. JPEG encoding

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