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When dealing with multiple devices interrupts, which mechanism is easy to implement?

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When dealing with multiple devices interrupts, which mechanism is easy to implement?

(a) Polling method

(b) Vectored interrupts

(c) Interrupt nesting

(d) None of the mentioned

This question was addressed to me in exam.

Asked question is from Interrupts topic in division Input/Output Organisation of Computer Architecture

1 Answer

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Correct answer is (a) Polling method

Easy explanation: In this method, the processor checks the IRQ bits of all the devices, whichever is enabled first that device is serviced.

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