Question 1: Consider The Following I/O Scenarios On A Single-User Pc:  A. A Mouse Used

Question 1: 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
Question 2: Describe three circumstances under which blocking I/O should be used
Describe three circumstances under which nonblocking I/O should be used
Why not just implement nonblocking I/O and have processes busy-wait until their devices are ready?