What is used to identify whether a data word has an odd or even number of 1’s ?

 a) Sign bit
 b) Zero bit
 c) Parity bit
 d) Carry bit
SSC CGL-15

Parity bit
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What is parity bit?
A parity bit, or check bit is a bit added to the end of a string of binary code that indicates whether the number of bits in the string with the value one is even or odd. Parity bits are used as the simplest form of error detecting code.

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