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If odd parity is used for ASCII error detection, the number of 0s per 8-bit symbol is _______(a) Indeterminate(b) 42(c) Even(d) OddI got this question in an online interview.This interesting question is from Parity Generators/Checkers in chapter Combinational Circuits of Digital Circuits

Answer»

The CORRECT option is (a) Indeterminate

Best EXPLANATION: Odd parity bit is 1 when the group of data bits consists of even number of 1s. So to make the group of data bits have odd number of 1s, 1 extra bit is added. If odd parity is used for ASCII error detection, the number of 0s PER 8-bit symbol is indeterminate because it is APPLICABLE only for 6-bit symbol.



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