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Q. 21) An Alphabet Consist Of The Letters A, B, C And D. The probability of occurrence is
p(a) = 0.4,
p(b) = 0.1,
p(c) = 0.2
and p(d) = 0.3.
The huffman code is

(A) A = 0 , B = 11 , C = 10 , D = 111
(B) A = 0 , B = 111 , C = 110 , D = 10
(C) A = 01 , B = 111 , C = 110 , D = 10
(D) A = 0 , B = 111 , C = 11 , D = 101
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Q. 22) The basic idea behind huffman coding is to

(A) Compress data by using more bits to encode more frequently occurring characters
(B) Compress data by using fewer bits to encode more frequently occurring characters
(C) Expand data by using fewer bits to encode more frequently occurring characters
(D) Compress data by using fewer bits to encode fewer frequently occurring characters
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Q. 23) Huffman coding is an encoding algorithm used for

(A) Lossy Data Compression
(B) Broadband Systems
(C) Lossless Data Compression
(D) Files Greater Than 1 Mbit
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Q. 24) A huffman encoder takes a set of characters with fixed length and produces a set of characters of

(A) Constant Length
(B) Random Length
(C) Fixed Length
(D) Variable Length
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Mr. Dubey • 51.47K Points
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Q. 25) A Huffman Code: A = 1, B = 000, C = 001, D = 01, P(A) = 0.4, P(B) = 0.1, P(C) = 0.2, P(D) = 0.3 The Average Number Of Bits Per Letter Is

(A) 8.0 Bit
(B) 2.0 Bit
(C) 2.1 Bit
(D) 1.9 Bit
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Q. 26) The idea with wavelets is to represent a complicated function by

(A) Sinus Functions
(B) Simple Basic Functions
(C) Lines
(D) Square Functions
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Q. 27) Down sampling is to make a digital image file smaller by

(A) Removing noise
(B) Adding noise
(C) Removing pixels
(D) Adding pixels
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Q. 28) In a typical picture, most pixels will be

(A) Very similar to their neighbors
(B) Very different to their neighbors
(C) Bright
(D) Equal
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Q. 29) Without losing quality, JPEG-2000 can achieve compression ratios of

(A) 2000:1
(B) 20:1
(C) 200:1
(D) 2:1
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Mr. Dubey • 51.47K Points
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Q. 30) The best visual compression quality is achieved using

(A) Dolby
(B) Wavelets
(C) Fourier transform
(D) DCT
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