Computer Science for IGCSE & O level - Data Transmission (Section 9 - No. 13)
What is the purpose of the extra bit added in a parity check?
To store the data
To indicate the length of the data
To ensure that the total number of '1' bits is always even or odd
To encrypt the data
解释
The parity bit makes the total number of 1s in each group (byte, block, etc.) either even or odd, as defined by the parity scheme used.