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Question

The original ASCII code used ___________ bits of each byte, reserving that last bit for error checking.

A
5
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B
6
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C
7
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D
8
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E
4
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Solution

The correct option is B 7

The original ASCII code used 7 bits of each byte, reserving that last bit for error checking.

ASCII is the American Standard Code for Information Interchange. It is a 7-bit code. The original ASCII table is encoded on 7 bits therefore it has 128 characters. ASCII and 7-bit ASCII are synonymous. Since the 8-bit byte is the common storage element, ASCII leaves room for 128 additional characters, which are used to represent a host of foreign language and other symbols (see code page).

The basic ASCII set uses 7 bits for each character, giving it a total of 128 unique symbols. The extended ASCII character set uses 8 bits, which gives it an additional 128 characters. The extra characters represent characters from foreign languages and special symbols for drawing pictures.


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