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

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.