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.
