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Consider the following I/O scenarios on a single-user PC:


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Consider the following I/O scenarios on a single-user PC:

a. A mouse used with a graphical user interface

b. A tape drive on a multitasking operating system (with no device preallocation available)

C. A disk drive containing user files

d. A graphics card with direct bus connection, accessible through memory-mapped I/O .

For each of these scenarios, would you design the operating system to use buffering, spooling, caching, or a combination? Would you use polled I/O or interrupt-driven I/O? Give reasons for your choices.

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