There are S dffent proceses cecuting in te system. The procesname, bust time and ariva ime are given in the elow tble Daw Gmat chat and calculte the average waigTime using premptive scheoduling for SIRF, (S Marks) Process Name Burst Time (ms) Arrial Time (ms) PI 3 P2 P3 P4 10 4 PS 15
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- process arrival burst time priority p1 0 10 2 p2 3 2 5 p3 4 5 1 p4 5 4 4 p5 7 7 3 1) Draw the sccheduling charts for non-preemptive version and preemptive version priority scheduling.…P1, P2, P3 and P4 are five processes arriving at different times of 0, 1, 5, 6. Each processhas a burst time of 2, 2, 3 and 4 respectively. Compute the average waiting time and drawthe Gantt chart illustrating the process executions using First-Come-First-Serve 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, use nonpreemptive scheduling, and base all decisions on the information you have at the time the decision must be made. Process Arrival Time Burst Time Pl 0.0 8 P2 0.4 4 P3 1.0 1 a. What is the average turnaround time for these processes with the FCFS scheduling algorithm?b. What is the average turnaround time for these processes with the SJF scheduling algorithm? c. The SJF algorithm is supposed to improve performance, but notice that we chose to run process P1 at time 0 because we did not k11ow that two shorter processes would arrive soon. Compute what the average turnaround time will be if the CPU is left idle for the first 1 unit and then SJF scheduling is used. Remember that processes P1 and P2 are waiting during this idle time, so their waiting time may increase. This algorithm could be known as future-knowledge…
- ProcessBurst Time Priority Arrival TimeP1 10 3 0P2 1 1 0P3 2 5 0P4 1 4 0P5 5 2 0For the set of processes directly above, draw a Gantt chart for the FCFS Scheduling Algorithm.1. 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, use scheduling, and base all decisions on the information you have at the time the decision must be made. Process Arrival Time Burst TimeP1 0 8P2 4 4P3 10 1a. Draw the Gantt chart for the above using FCFS scheduling algorithm b. Draw the Gantt chart for the above using SJF non-preemptive scheduling algorithm. c. What is the average waiting time for these processes with the FCFS scheduling and SJF non-preemptive algorithms? d. What are the 2 major activities of an operating system with regards to process management? e. Which of the following instructions should be privileged? Read the clock.Clear memory. f. What is the purpose of system…110. A system has 12 magnetic tape drives and 3 processes : P0, P1, and P2. Process P0 requires 10 tape drives, P1 requires 4 and P2 requires 9 tape drives.Process P0 P1 P2 Maximum needs (process-wise : P0 through P2 top to bottom) 10 4 9Currently allocated (process-wise)522Which of the following sequence is a safe sequence ? a. P0, P1, P2 b. P1, P2, P0 c. P2, P0, P1 d. P1, P0, P2
- 41. A critical region a. is a piece of code which only one process executes at a time b. is a region prone to deadlock c. is a piece of code which only a finite number of processes execute d. is found only in Windows NT operation systemplease select only correct option : 1) In ………………. only one process at a time is allowed into its critical section * a, Synchronization b, Mutual Exclusion c, Deadlock d, All of the given 2) To avoid race condition, ____ process(es) at a time can manipulate the shared variable. * a, One b, Two c, Three d, None 3) Process synchronization can be done through * a, Hardware b, Software c, Both Hardware and Software d, None of the given 4) For better memory-space utilization ________ is used a, Dynamic loading b, Static loading c, Dynamic linking Static linking d, All of the given 5) Peterson algorithm is restricted to ___ processes * a, One b, Three c, Five d, None of the givenTask 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (8 marks)A system adopts a round-robin scheduling approach, where every process gets thesame amount of execution time. In a recorded timespan, the system has four processesP1, P2, P3 and P4, none of which perform any I/O. They are shown in the followingsequence diagram: 2.1 What is the dispatch time for the given system? (1)2.2 What execution time is given to each process? (1)2.3 What is the average time spent waiting by a process? Show all calculations. (2)
- Below the Gannt chart of four processes P1, P2 ,P3 and P4 using SJF algorithm. process, then find the average waiting time. Write a table of a burst time for eachThree processes and their service times are P1 = 200, P2 = 125, P3 = 70 are to be scheduled to run using the Round Robin Scheduling algorithm with a time slice of 50. Calculate the Turn Around Time for P2 (Assume they get scheduled to run in the order P1, p2, p3). a. 395 b. 345 c. 250 d. 270 e. 125) Michael uses an Operating system which always give him problems of “resource hogging” bydevices he is using on his PC and also by programs he launch.i. As an OS specialist, explain the reason(s) for the cause of these problems.Explain the mechanism(s) that can be used to resolve these issues above in (i)b)α) The diagram below is the process table of a process manager of X OS. Use it to answerquestions below ii. Using the Priority process scheduler, and given that P3 is the only job issued by the CEO ofthe company using the X OS, whereas the rest of the jobs are all issued by the secretary whichprocess will be run third? (Explain briefly)iii. Which scheduler will pre-empt processes based on a given allocated time slot. (Explainbriefly)iv. Using the Shortest Job First process scheduler, which process will be run third? (Explainbriefly)v. Explain briefly one virtual memory manager which can be used to manage the processes andhow they will be managed by that virtual memory…