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IT - Practice part

Descrição

Information Theory Quiz sobre IT - Practice part, criado por Csse 1502 em 14-05-2018.
Csse 1502
Quiz por Csse 1502, atualizado more than 1 year ago
Csse 1502
Criado por Csse 1502 aproximadamente 6 anos atrás
1716
2
0

Resumo de Recurso

Questão 1

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

Questão 2

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

Questão 3

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

Questão 4

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

Questão 5

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

Questão 6

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

Questão 7

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

Questão 8

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

Questão 9

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

Questão 10

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

Questão 11

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

Questão 12

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

Questão 13

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

Questão 14

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

Questão 15

Questão
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
Responda
  • 2.1 bit
  • 1.9 bit
  • 2.0 bit
  • 8.0 bit

Questão 16

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

Questão 17

Questão
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
Responda
  • 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

Questão 18

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

Questão 19

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

Questão 20

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

Questão 21

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

Questão 22

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

Questão 23

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

Questão 24

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

Questão 25

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

Questão 26

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

Questão 27

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

Questão 28

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

Questão 29

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

Questão 30

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

Questão 31

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

Questão 32

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

Questão 33

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

Questão 34

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

Questão 35

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

Questão 36

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

Questão 37

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

Questão 38

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

Questão 39

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

Questão 40

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

Questão 41

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

Questão 42

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

Questão 43

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

Questão 44

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

Questão 45

Questão
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?
Responda
  • 2/3
  • 8/21
  • 3/7
  • 9/22

Questão 46

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

Questão 47

Questão
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)
Responda
  • i1
  • i2
  • i3
  • i4

Questão 48

Questão
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)
Responda
  • i4
  • i1
  • i2
  • r2

Questão 49

Questão
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)
Responda
  • r2
  • r1
  • r3
  • i3

Questão 50

Questão
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)
Responda
  • i1
  • i2
  • i3
  • i4

Questão 51

Questão
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,
Responda
  • r3
  • r2
  • r1
  • no error

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