Suppose that the following processes arrive for execution at the times indicated. Eachprocess has the shown priorities and will run for the amount of time listed (all times are inms)ProcessArrival TimeBurst TimePriority QueueP1153P2203P32020P425102P53052P635151To schedule the execution of these process, a preemptive multi-level queue scheduler isdesigned to apply the following policy at each decision instant (namely whenever a newprocess arrives and whenever a burst completes execution):• Serve the process at the highest priority queue first• If two processes are in the same queue:. If they have different remaining time, follow the SRTF policyo If they have same remining time, follow a RR policy (slice time = 2 ms)Given the above:1. Show the scheduling order of the bursts using a Gantt chart.

In priority scheduling, we schedule processes based on given priority. The processes with the…

Answered: Suppose that the following processes…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Four processes arrive at the same time with their priorities, execution times and I/O times given in the table below. Assuming a Round-Robin Scheduling works with a quantum time of 3, but the scheduler selects the process with highest priority from the queue (NOT those arrived earliest), other than currently pre-empted process, at each turn; a-)Draw the timeline for CPU- and I/O- bursts for these processes b-)Calculate average turn-around time
If you are working with scheduling policies, you are requested to investigate the variation of round robin in which a process that has used its full time quantum is returned to the end of the READY queue, while one that has used half of its time quantum is returned to the middle of the queue and one that has used one-fourth of its time quantum goes to a place one-fourth of the distance away from the beginning of the queue. Question 5 Explain the advantages and disadvantages of this scheduling policy. Identify the user group that would find this most advantageous. Describe the unique threats to a data centre posed by disgruntled employees. Describe how you would identify such people, if possible, and how you would protect your system from these threats. What are the parameters that affect the efficiency of the round robin?
If you are working with scheduling policies, you are requested to investigate the variation of round robin in which a process that has used its full time quantum is returned to the end of the READY queue, while one that has used half of its time quantum is returned to the middle of the queue and one that has used one-fourth of its time quantum goes to a place one-fourth of the distance away from the beginning of the queue. Identify the user group that would find this most advantageous. Describe the unique threats to a data centre posed by disgruntled employees. Describe how you would identify such people, if possible, and how you would protect your system from these threats. What are the parameters that affect the efficiency of the round robin?
If you are working with scheduling policies, you are requested to investigate the variation of round robin in which a process that has used its full time quantum is returned to the end of the READY queue, while one that has used half of its time quantum is returned to the middle of the queue and one that has used one-fourth of its time quantum goes to a place one-fourth of the distance away from the beginning of the queue. 5.1 Explain the advantages and disadvantages of this scheduling policy. 5.2 Identify the user group that would find this most advantageous. 5.3 Describe the unique threats to a data centre posed by disgruntled employees. Describe how you would identify such people, if possible, and how you would protect your system from these threats. 5.4 What are the parameters that affect the efficiency of the round robin?
Processes P1, P2, and P2 are queued to run. The arrival time of P1 is t = 0, the arrival time of P2 is t = 1, and the arrival time of P3 is t = 2. According to the first come first serve (FCFS) algorithm, processes are run by the operating system. P1 operates 7 time units, P2 4 time units, P3 operates 1 time unit. So what is the average waiting time (in time units) for this system? 0 5 3 7
(a) FCFS with a single Ready Queue. A process gets scheduled once one of the CPUsis available. When both CPUs are available, we select CPU1. (b) FCFS with a Ready Queue per CPU. Processes A, B, and C go to CPU1 and processesD, E, and F go to CPU2. (c) HRRN with a single Ready Queue. A process gets scheduled once one of the CPUsis available. When both CPUs are available, we select CPU1.
please choose only correct answer : 1) Tool for process synchronization is * a, Pipe b, Thread c, Semaphore d, B and C e, All of the given 2) term scheduler select processes from the pool and load them into the memory for execution. * a, Short b, Medium c, Middle d, None of the given 3) A ………………….. is used to hold processes waiting on the semaphore. * a, Tree b, Stack c, Queue d, Graph 4) The methods of Dynamic partitioning suffer from ___ * a, Internal fragmentation b, external fragmentation c, Internal segmentation d, external segmentation 5) __________ creating multiple fragments in the memory because of the processes moving in and out * a, Fragmentation b, Paging c, Segmentation d, Swapping 6) Run-time mapping is done through * a, Firmware b, Software c, MMU d, All of the given 7)To control the degree of multiprogramming ______ scheduler is used for swapping processes in and out of memory * a, Medium-term b, Long-term c, Short-term d, All of the given
Transcribed Image Text Consider the following set of processes, with arrival times and the length of the CPU burst time given in milliseconds. a. Draw a Gantt chart that illustrates the execution of these processes using the Shortest-Remaining Time First (SRTF) scheduling algorithm. b. Give the average waiting time of Shortest-Remaining Time First (SRTF) scheduling algorithm. Note: Preempted processes are added to the end of the ready queue. Process Arrival Time Burst Time A 4 B 1 3 1 D 3 4 3
The ready queue is divided into numerous queues by the Multilevel scheduling algorithm, each with its own scheduling policy or procedure. Decide on one of the following: Is this a fact or a myth? Processes should be scheduled in such a way as to minimise the time they spend waiting. Pick one: A True or False
Consider the FCFS, SJF, and RR (quantum = 8 milliseconds) scheduling algorithms for this set of processes. Process Burst Time P1 8 P2 25 P3 3 P4 7 P5 11 The processes are assumed to have arrived in the order P1, P2, P3, P4, P5, all at time 0. a) Draw Gantt charts that illustrate the execution of these processes using the following scheduling algorithms: FCFS, SJF, and RR. b) What is the waiting time of each process for each of these scheduling algorithms? c) Which of the algorithms results in the minimum average waiting time (overall processes)? d) Derive the Need (max-Alloc) matrix. It should be presented like the Allocation or Maximum matrices above. e) If the request from process P1 arrives for (0,1,2,0), can the request be granted? Why?
we need to make a c program using multi process approach , one process will initialize 7 processes the first one of them will create the other 6 processes each one of them will do one of this algorithms fcfs , sjf,srtf,rr with quantum = 5 Preemptive Priority Scheduling, with aging; where priority is decremented by 1 if the process remains in the ready queue for 5 time units. 6- Non-preemptive Priority Scheduling, with aging; where priority is decremented by 1 if the process remains in the ready queue for 5 time units and it must schedule them and keep updating the status (and printing it ) like ready , waiting,executing,etc. of the processes in this set of processes : Process Arrival Time Burst Time Comes-back-after Priority P1 0 10 2 3 P2 1 8 4 2 P3 3 14 6 3 P4 4 7 8 1 P5 6 5 3 0 P5 7 4 6 1 P7 8 6 9 2 the prgoram must print the results which are : the Gantt chart, average waiting time, and average turnaround time. , note that Burst Time is the maximum duration allowed at a single go…
Using a number of different queues, each with its own scheduling strategy, is how the Multilevel scheduling algorithm works with the ready queue. Pick one: What's the deal? The time an individual process spends waiting should be minimized by the CPU scheduler. To choose one: The two alternatives are: FALSE or TRUE

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