Consider a system with 3 I/O devices:
D1, D2, and D3, with increasing priorities of 1 (low priority), 2 and 3 (high priority), respectively. At t=0, user program begins, device D2 interrupt occurs at t=10, device D1 interrupt occurs at t=15, device D3 interrupt occurs at t=25. We assume D1 ISR takes 30 time units, D2 ISR takes 20 units, and D3 ISR takes 10 units.
• Explain interrupt process and its advantage
• Explain briefly the two techniques that can be used to deal with multiple interrupts
• Give the advantage and disadvantage of the first technique compared to the second one.
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