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Computer Science for IGCSE & O level - Data Transmission (Section 11 - No. 46)

Which of the following methods uses an extra bit added to a byte to ensure an even or odd number of 1s or add number of 1?
Cycle redundancy check
Parity check
Checksum
Echo digit

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Parity check is a simple method for detecting errors by adding a bit to a byte to make the number of 1s either even or odd.

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