what component of an operating system is executed as the result of an interrupt signal?

The component of an operating system executed as a result of an interrupt signal is the interrupt handler, also known as an interrupt service routine (ISR). When an interrupt occurs, the CPU temporarily halts its current operations, saves its state, and transfers control to the ISR associated with that specific interrupt. The ISR processes the interrupt, performing necessary tasks such as handling hardware events or managing system calls, before returning control back to the original process. This mechanism allows the system to respond promptly to events like input/output operations or timer expirations.