Reference no: EM13897211

1) The following state transition table is a simplified model of process management, with the labels representing transitions between states of READY, RUN, BLOCKED, AND NONRESIDENT.

	READY	RUN	BLOCKED	NONRESIDENT
READY	-	1	-	5
RUN	2	-	3	-
BLOCKED	4	-	-	6

Give an example of an event that can cause each of the above transitions. Draw a diagram if that helps.

2) In a number of early computers, an interrupt caused the register values to be stored in fixed location associated with the given interrupt signal. Under what circumstances is this a practical technique? Explain why it is inconvenient in general.

3) You have executed the following C program:

main ()

int pid;

Pid = fork ();

Printf ("%d n , pid);

What are the possible outputs, assuming the fork succeeded?

4) It was pointed out that two advantages of using multiple threads within a process are that (1) less work is involved in creating a new thread within an existing process than in creating a new process, and (2) communication among threads within the same process is simplified. Is it also the case that a mode switch between threads within the same process involves less work than a mode switch between two threads in different processes?

5) In the discussion of ULTs verses KLTs, it was pointed out that a disadvantage of ULTs is that when a ULT executes a system call, not only is that thread blocked, but also all of the threads within the process are blocked. Why is that so?

6) If a process exits and there are still threads of that process running, will they continue to run? Explain.