DATA REPRESENTATION AND NUMBER SYSTEMS
ASCII AND UNICODE CHARACTER ENCODING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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127
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256
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65, 536
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128
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Detailed explanation-1: -The biggest number that can be held in 7-bits is 1111111 in binary (127 in decimal). Therefore 128 different characters can be represented in the ASCII character set (Using codes 0 to 127). More than enough to cover all of the characters on a standard English-Language keyboard.
Detailed explanation-2: -With 7-bits of 2’s complement, it could range from-64 to 63. (traditionally, 7 bits can only go up to 2^n-1 which is 128 but MSB is reserved for sign, so we could have 6 bits to represent the data. We will be getting 64 positive and 63 negative values and answer should be-64, 63.)
Detailed explanation-3: -With 7 bits, you can represent 27 = 128 binary integers. With two digits, you can represent 102 = 100 decimal integers.