Question

What will happen in that condition, if an interrupt occurs while the microcontroller is serving any other interrupt?

(a) both the interrupts will be handled simultaneously

(b) the interrupt which is being done first will be served first

(c) the interrupt that is more priority in the interrupt vector table will be served first

(d) the interrupt having low priority in the interrupt vector table will be served first

I had been asked this question in homework.

I want to ask this question from Interrupt Programming in portion AVR Microcontroller of Microcontroller

Answer 1

The correct choice is (c) the interrupt that is more priority in the interrupt vector table will be served first

To explain I would say: If two or more interrupts occur simultaneously then the interrupt that is having more priority in the interrupt vector table will be served first.