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IT - Practice part

Description

Information Theory Quiz on IT - Practice part, created by Csse 1502 on 14/05/2018.
Csse 1502
Quiz by Csse 1502, updated more than 1 year ago
Csse 1502
Created by Csse 1502 over 6 years ago
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Resource summary

Question 1

Question
A card is drawn from a pack of 52 cards. The probability of getting a king of heart is
Answer
  • 1/26
  • 1/52
  • 1/13
  • 2/13

Question 2

Question
A card is drawn from a pack of 52 cards. The probability of getting a queen or a king of heart is
Answer
  • 1/52
  • 1/26
  • 1/13
  • 2/13

Question 3

Question
A code has two allowable combinations 101 and 010. What is the allowable combination for the error combination 001?
Answer
  • 101
  • 010
  • 001
  • None

Question 4

Question
A code has two allowable combinations 101 and 010. What is the allowable combination for the error combinat
Answer
  • 101
  • 01
  • 100
  • None

Question 5

Question
A code has two allowable combinations 101 and 010. What is the allowable combination for the error combination 000?
Answer
  • 010
  • 101
  • 000
  • None

Question 6

Question
51. Code has dmin = 9. How many errors can be corrected by this code?
Answer
  • 5
  • 7
  • 4
  • 8

Question 7

Question
A code has two allowable combinations 101 and 010. What is the allowable combination for the error combination 111?
Answer
  • 101
  • 010
  • 111
  • None

Question 8

Question
52. Code has dmin = 9. How many errors can be detected by this code?
Answer
  • 7
  • 9
  • 8
  • 4

Question 9

Question
57. Determine the Hamming distance for code that can detect 3 errors and correct 2 errors.
Answer
  • 6
  • 5
  • 7
  • 9

Question 10

Question
A code has two allowable combinations 101 and 010. What is the allowable combination for the error combination 011?
Answer
  • 010
  • 101
  • 011
  • None

Question 11

Question
58. Determine the Hamming distance for code that can detect 3 errors and correct 1 errors.
Answer
  • 5
  • 4
  • 6
  • 8

Question 12

Question
A code has two allowable combinations 101 and 010. What is the allowable combination for the error combination 110?
Answer
  • 010
  • 101
  • 110
  • None

Question 13

Question
59. Determine the Hamming distance for code that can detect 5 errors and correct 3 errors.
Answer
  • 9
  • 8
  • 10
  • 14

Question 14

Question
A fair coin is tossed four times, the probability of getting four heads is
Answer
  • 1/4
  • 1/16
  • 1
  • 1/2

Question 15

Question
A Huffman code is a = 1, b = 000, c = 001, d = 01. Probabilities are p(a) = 0.4, p(b) = 0.1, p(c) = 0.2, p(d) = 0.3. The average length of codewords q is
Answer
  • 2.1 bit
  • 1.9 bit
  • 2.0 bit
  • 8.0 bit

Question 16

Question
60. Encode a string "0000" with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • 0000001
  • 0000111
  • 0000000
  • 0000101

Question 17

Question
An alphabet consist of the letters a, b, c and d. The probability of occurrence is \n p(a) = 0.4, p(b) = 0.1, p(c) = 0.2 and p(d) = 0.3. The Huffman code is
Answer
  • a=0,b=111,c=11,d=101
  • a=0,b=110,c=111,d=10
  • a=0,b=11,c=10,d=111
  • a=01,b=111,c=110,d=10

Question 18

Question
61. Encode a string "0001" with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • 0001010
  • 0001001
  • 0001011
  • 0001111

Question 19

Question
Bag contain 10 black and 20 white balls, One ball is drawn at random. What is the probability that ball is white
Answer
  • 1
  • 2/3
  • 1/3
  • 4/3

Question 20

Question
62. Encode a string "0010" with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • 0010010
  • 0010111
  • 0010110
  • 0010100

Question 21

Question
Calculate the code rate for Hamming (15,11) code
Answer
  • 1
  • 0,73
  • 0,571
  • 0,839

Question 22

Question
63. Encode a string "0011" with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • 0011100
  • 0011001
  • 0011101
  • 0011111

Question 23

Question
64. Encode a string "0100" with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • 0100011
  • 0100110
  • 0100111
  • 0100101

Question 24

Question
Calculate the code rate for Hamming (31,26) code
Answer
  • 1
  • 0,839
  • 0,733
  • 0,571

Question 25

Question
65. Encode a string "0101" with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • 0101101
  • 0101000
  • 0101100
  • 0101110

Question 26

Question
Calculate the code rate for Hamming (7,4) code
Answer
  • 1
  • 0,571
  • 0,733
  • 0,839

Question 27

Question
Calculate the efficiency of the language if it has 32 letters and its I average is 1 bit.
Answer
  • 0,8
  • 0,2
  • 5
  • 1

Question 28

Question
66. Encode a string "0110" with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • 0110101
  • 0110011
  • 0110001
  • 0110000

Question 29

Question
Calculate the redundancy of the language if it has 32 letters and its I average is 1 bit.
Answer
  • 0,8
  • 0,2
  • 5
  • 1

Question 30

Question
Code has dmin = 1. How many errors can be corrected by this code?
Answer
  • 2
  • 3
  • 0
  • 1

Question 31

Question
67. Encode a string "0111" with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • 0111110
  • 0111000
  • 0111010
  • 0111011

Question 32

Question
Code has dmin = 1. How many errors can be detected by this code?
Answer
  • 2
  • 3
  • 0
  • 1

Question 33

Question
68. Encode a string "1000" with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • 1000111
  • 1000100
  • 1000101
  • 1000001

Question 34

Question
Code has dmin = 10. How many errors can be detected by this code?
Answer
  • 4
  • 8
  • 9
  • 10

Question 35

Question
Code has dmin = 11. How many errors can be corrected by this code?
Answer
  • 11
  • 7
  • 5
  • 10

Question 36

Question
69. Encode a string "1001" with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • 1001111
  • 1001010
  • 1001110
  • 1001100

Question 37

Question
70. Encode a string "1010" with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • 1010111
  • 1010001
  • 1010011
  • 1010010

Question 38

Question
71. Encode a string "1011" with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • 1011100
  • 1011010
  • 1011000
  • 1011001

Question 39

Question
72. Encode a string "1100" with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • 1100110
  • 1100000
  • 1100010
  • 1100011

Question 40

Question
73. Encode a string "1101" with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • 1101101
  • 1101011
  • 1101001
  • 1101000

Question 41

Question
74. Encode a string "1110" with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • 1110000
  • 1110101
  • 1110100
  • 1110110

Question 42

Question
75. Encode a string "1111" with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • 1111110
  • 1111011
  • 1111111
  • 1111101

Question 43

Question
76. Find the information amount of a symbol from the language with total number of symbols n = 18.
Answer
  • I = log218
  • I = log182
  • I = 18 * log218
  • I = 18 * log182

Question 44

Question
83. If a card is chosen from a pack of 52 cards, what is the probability of getting a five or a seven?
Answer
  • 4/52
  • 8/52
  • 1/26
  • 1/169

Question 45

Question
84. In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither blue nor green?
Answer
  • 2/3
  • 8/21
  • 3/7
  • 9/22

Question 46

Question
87. In a throw of dice what is the probability of getting number greater than 5.
Answer
  • 1/3
  • 1/6
  • 1/5
  • 1

Question 47

Question
96. Specify the error position in the string "0000110", if the initial string was encoded with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • i1
  • i2
  • i3
  • i4

Question 48

Question
97. Specify the error position in the string "0001110", if the initial string was encoded with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • i4
  • i1
  • i2
  • r2

Question 49

Question
98. Specify the error position in the string "0011001", if the initial string was encoded with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • r2
  • r1
  • r3
  • i3

Question 50

Question
99. Specify the error position in the string "0101011", if the initial string was encoded with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1, r2, r3)
Answer
  • i1
  • i2
  • i3
  • i4

Question 51

Question
100. Specify the error position in the string "0101110", if the initial string was encoded with Hamming (7,4) code using the following structure (i1, i2, i3, i4, r1,
Answer
  • r3
  • r2
  • r1
  • no error
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