uniti the following table shows the truth table of -input ex-nor gate ab advantages of logic gates logic gates are quick yet use low energy logic gates don' get overworked logic gates can lessen the prescribed number of / ports needed by microcontroller logic gates can bring about straightforward data encryption and decryption applications of logic gates nand gates are used in burglar alarms and buzzers they are basically used in circuits involving computation and processing they are also used in push button switches door bell they are used in the functioning of street lights operating systemthe collection of computer programs that control the interaction of the user and computer hardware is called the operating system its responsibilities are communicating with the userreceiving commands and carrying them out department of csevishnu institute of technology