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What happens to the interrupts in an interrupt service routine?

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What happens to the interrupts in an interrupt service routine?

(a) disable interrupt

(b) enable interrupts

(c) remains unchanged

(d) ready state

The question was posed to me by my college professor while I was bunking the class.

This question is from Priority Inversion in portion Real Time Operating systems of Embedded Systems

1 Answer

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Best answer
The correct option is (a) disable interrupt

The best explanation: In the interrupt service routine, all the other interrupts are disabled till the routine completes which can cause a problem if another interrupt is received and held pending. This can result in priority inversion.

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