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This is the encoding of some of the lower case alphabet characters in 7bit-ASCII

ID: 3791415 • Letter: T

Question

This is the encoding of some of the lower case alphabet characters in 7bit-ASCII code in both decimal and hexadecimal.

Dec

97

98

99

100

101

102

103

104

105

Hex

61

62

63

64

65

66

67

68

69

Char

a

b

c

d

e

f

g

h

i

Dec

111

112

113

114

115

116

117

118

119

120

Hex

6F

70

71

72

73

74

75

76

77

78

Char

o

p

q

r

s

t

u

v

w

x

What will be the hexadecimal representation of the word “tod” and the word “esd” after each character has been converted to its own 7bit ASCII code representation and had an even parity bit added to the LSB to each character to form an 8-bit codeword?

Dec

97

98

99

100

101

102

103

104

105

Hex

61

62

63

64

65

66

67

68

69

Char

a

b

c

d

e

f

g

h

i

Explanation / Answer

1.

tod : 7 bit ASCII code -746F64

t-74 in Binary: 0111 0100

o- 6F in Binary : 0110 1111

d-64 in Binary: 0110 0100

after adding even parity bit to LSB i.e 1

as already 0 had LSB as 1,not adding.

the new Binary value is

0111 0101 0110 1111 0110 0101

the new Hexadecimal value is : 756F65

2.

esd:

ASCI Code: 65 73 64

Binary : 01100101 01110011 01100100

Adding even parity to LSB:01100101 01110011 011001001

the new Hexadecimal value is : 657365

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