Data Compression MCQ Questions And Answers
Data Compression MCQs : This section focuses on "Data Compression" in Data Structure. These Multiple Choice Questions (MCQ) should be practiced to improve the Data Structure skills required for various interviews (campus interviews, walk-in interviews, company interviews), placements, entrance exams and other competitive examinations.
1. _______ is the process of encoding information using fewer bits than the original representation
A. Data loss
B. Data compression
C. Data transmit
D. Data gain
View Answer
Ans : B
Explanation: Data compression is the process of encoding information using fewer bits than the original representation
2. How many types of compression there?
A. 4
B. 3
C. 2
D. 5
View Answer
Ans : C
Explanation: There are two kinds of compression: Lossless and Lossy
3. Which compression loses data?
A. Lossy compression
B. Lossless compression
C. Both A and B
D. None of the above
View Answer
Ans : A
Explanation: Lossy compression loses data, while lossless compression keeps all the data. With lossless compression we don't get rid of any data.
4. Which of the following is Lossless Data Compression Algorithms?
A. LZ77
B. LZR
C. DEFLATE
D. All of the above
View Answer
Ans : D
Explanation: All of the above are Lossless Data Compression Algorithms.
5. Lossy compression reduces bits by removing unnecessary or less important information
A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
View Answer
Ans : A
Explanation: True, Lossy compression reduces bits by removing unnecessary or less important information
6. Which of the following is true about Lempel–Ziv–Welch (LZW) algorithm?
A. Optimized for compressing plain text
B. Used by GIF images and Unix's compress utility
C. Used by WinRAR in tandem with Huffman coding
D. used by ZIP, gzip, and PNG images
View Answer
Ans : B
Explanation: Lempel–Ziv–Welch (LZW) : Used by GIF images and Unix's compress utility
7. Which of the following algorithms has very high compression ratio, used by 7zip and xz?
A. LZSS
B. LZO
C. LZMA
D. LZW
View Answer
Ans : C
Explanation: Lempel–Ziv–Markov chain algorithm (LZMA) : Very high compression ratio, used by 7zip and xz
8. Uncompressed video requires a ________ data rate.
A. high
B. low
C. medium
D. very high
View Answer
Ans : D
Explanation: Uncompressed video requires a very high data rate.
9. Which of the following is not a audio compression algorithms?
A. ALAC
B. DST
C. JSAC
D. OSQ
View Answer
Ans : C
Explanation: JSAC is not a audio compression algorithms.
10. Lossy image compression is used in digital cameras, to increase storage capacities
A. Yes
B. No
C. Can be yes or no
D. Can not say
View Answer
Ans : A
Explanation: Yes, Lossy image compression is used in digital cameras, to increase storage capacities
Discussion