Question

Which of the following has more priority?

(a) system reset

(b) machine check

(c) external interrupt

(d) decrementer interrupt

This question was addressed to me in an interview for job.

This is a very interesting question from RISC Exceptions-II in section Interrupts and Exceptions of Embedded Systems

Answer 1

Right answer is (a) system reset

Explanation: The system reset has the first priority then comes the machine reset, next priority moves for the instruction dependent, and the next priority is an external interrupt, and last priority level goes for the decrementer interrupt.