GATES are useful in CIRCUITS for parity generation and checking.In the transmission of data from one place to another, the TRANSMITTER can attach a parity BIT to a set of data bits before transmitting the data bits to a receiver.The logic circuitry for parity generation is as shown: The receiver uses a parity checker to detect any single-bit ERRORS that may have occurred during the transmission. The circuit for parity checker using Ex-OR gates is as shown: