The simplest error detecting scheme is to append a parity bit to the end of a block of data.

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Quizplus · Accepted Answer

This is true, appending a parity bit (which is a single bit that is set to either 0 or 1 based on the number of 1's in the data) is a simple form of error detection. If an error occurs during transmission and the parity bit is different from what it should be, the receiver can detect that the block of data has been corrupted.

The Simplest Error Detecting Scheme Is to Append a Parity