Question: PLEASE HELP ANSWER THE FOLLOWING THREE QUESTIONS. 1. What are external interrupts in PintOS? Give one example of external interrupt in PintOS and the part

PLEASE HELP ANSWER THE FOLLOWING THREE QUESTIONS.

1. What are external interrupts in PintOS? Give one example of external interrupt in PintOS and the part of the source code where you found it. What are their special characteristics in-terms of preemption and nesting?

2. How many interrupts found in PintOS? Name 5 of them. Where did you find them?

3. How many processors are simulated in PintOS? Would inhibiting interrupts for critical section execution work in PintOS environment? Explain.

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