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A CPU handles interrupt by executing interrput service subroutine ____

  1. by checking  interrupt register after execution of each instruction
  2. by checking  interrupt register at the end of the fetch cycle
  3. whenever an interrupt is registered
  4. by checking  interrupt register at regular time interval
in CO and Architecture by Veteran
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A CPU handles interrupt by executing interrput service subroutine by checking the interrupt register after finishing the execution of the current instruction.

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