A CPU generally handles an interrupt by executing an interrupt service routine

as soon as an interrupt is raised

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by checking the interrupt register after finishing the execution of the current instruction

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by checking the interrupt register at the end of fetch cycle

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by checking the interrupt register at fixed time intervals

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Solution

The correct option is B by checking the interrupt register after finishing the execution of the current instruction
Interrupt handled by execution of interrupt service routine. It checks interrupt register after finishing the execution of current instruction.

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