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GATE | GATE-CS-2009 | Question 60

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  • Last Updated : 28 Jun, 2021

A CPU generally handles an interrupt by executing an interrupt service routine
(A) As soon as an interrupt is raised
(B) By checking the interrupt register at the end of fetch cycle.
(C) By checking the interrupt register after finishing the execution of the current instruction.
(D) By checking the interrupt register at fixed time intervals.

Answer: (C)

Explanation: Hardware detects interrupt immediately, but CPU acts only after its current instruction. This is followed to ensure integrity of instructions.

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