What is the purpose of interru

An interrupt is a hardware-generated change-of-flow within the system.An interrupt handler is summoned to deal with the cause of the interrupt;control is then returned to the interrupted context and instruction.A trap is a software-generated interrupt.An interrupt can be used to signal the completion of an I/O to obviate the need for device polling.A trap can be used to call operating system routines or to catch arithmetic errors.