The real difficulty with SJF in short term scheduling is ____________a.knowing the length of the next CPU requestb.it is too complex to understandc.it is too good an algorithmd.none of the mentioned

What are the disadvantages of FCFS scheduling algorithm as compared to shortestjob first (SJF) scheduling?

Suppose that the following processes arrive for execution at the times indicated.Each process will run for the amount of time listed. In answering the questions, usenonpreemptive scheduling, and base all decisions on the information you have at the timethe decision must be made.Process Arrival Time Burst TimeP1 0.0 8P2 0.4 4P3 1.0 1a. What is the average turnaround time for these processes with the FCFSscheduling algorithm?b. What is the average turnaround time for these processes with theSJF scheduling algorithm?c. The SJF algorithm is supposed to improve performance, but notice that we choseto run process P1 at time 0 because we did not know that two shorter processes wouldarrive soon. Compute what the average turnaround time will be if the CPU is left idle forthe first 1 unit and then SJF scheduling is used. Remember that processes P1 and P2 arewaiting during this idle time, so their waiting time may increase. This algorithm could becalled future-knowledge scheduling.Exercises 3.Consider the following set of processes, with the length of the CPU burstgiven in milliseconds:Process Burst Time PriorityP1 2 2P2 1 1P3 8 4P4 4 2P5 5 3

You are given the Gantt chart for the Shortest Job First (SJF) scheduling algorithm. Assume all processes arrive at the same time at t=0 What is the CPU Burst time for P2?Answer 1 Question 14What is the turnaround time for P3?Answer 2 Question 14What is the CPU Burst time for P1?Answer 3 Question 14What is the waiting time for P3?Answer 4 Question 14What is the waiting time for P1?Answer 5 Question 14What is the waiting time for P4?Answer 6 Question 14What is the turnaround time for P2?Answer 7 Question 14

Solve following example by FCFS and SJF CPU schedulingalgorithm. Draw Gantt Chart and calculate Average Waiting Timeand Average Turnaround time.Process Arrival Time Burst TimeP0 0 10P1 1 6P2 3 2P3 5 4

Preemptive Shortest Job First scheduling is sometimes called ___________a.Fast SJF schedulingb.EDF scheduling – Earliest Deadline Firstc.c) HRRN scheduling – Highest Response Ratio Nextd.d) SRTN scheduling – Shortest Remaining Time Next