
Data compression
Quiz
•
Computers
•
University
•
Practice Problem
•
Hard
Praveen Mittal
Used 3+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
An alphabet consist of the letters A, B, C and D. The probability of occurence of A=0.4, B=0. 1,C=0.2 and D=0.3 The Huffman code is
A0
B111
C110
D10
A0
B111
C11
D101
A01
B111
C110
D10
0
11
10
111
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The basic idea behind Huffman coding is to
Fever bits to encode fewer frequently occuring character
Expand data by using fewer bits to encode more frequently occuring character
Compress data by using more bit to encode more frequently occuring character
Compress data by using fewer bits to encode more frequently occuring character
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Huffman coding is an encoding algorithm used for
Broadband system
Lossy data compression
Lossless data compression
Files greater than 1 Mbit
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Huffman encoder takes a set of characters with fixed length and produces a set of characters of
Constant length
Random length
Fixed length
Variable length
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Huffman code A1, B000, C001, D01. probability of A=0.4, B=0.1, C=0.2and D=0.3.
The average number of bits per letter is
1.9
2
2.1
8
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The idea with wavelets is to represent a complicated function by
Lines
Sinus function
Simple basic function
Square function
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Down sampling is to make a digital image file smaller by
Adding noise
Adding pixels
Removing pixels
Removing noise
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