CS 537 - Quiz #1

1. Most hardware provides user mode and kernel mode; applications are run in
user mode and the OS runs in kernel mode. Transitioning from one to the other
happens via a system call. What takes place during a system call?

2. What are three states a process can be in whilst active in the system?

3. Assume a set of 5 jobs arrive at T=0, each of length 10. For simplicity,
we'll assume context switching takes 0 time, and a time slice is 1 time unit.
      (a) Using SJF, what is the average turnaround time?
      (b) Using RR, what is the average turnaround time?