What is an interrupt?

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What is an interrupt?

An interrupt is a signal or event that interrupts the normal execution of a program and transfers the control to a specific routine called an interrupt handler or interrupt service routine (ISR). It allows the processor to respond to external events or internal conditions, such as hardware devices requesting attention, software exceptions, or system calls. Interrupts are used to handle time-critical tasks, improve system efficiency, and enable multitasking in assembly language programming.