12. A CPU with interrupt-driven I/O is busy servicing a disk request. While the CPU is midway...

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12. A CPU with interrupt-driven I/O is busy servicing a disk request. While the CPU is midway through the disk-service routine, another I/O interrupt occurs.

a) What happens next?

b) Is it a problem?

c) If not, why not? If so, what can be done about it?

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