a) Draw a Gantt chart showing FCFS scheduling for these jobs and find average waiting time. b) Draw a Gantt chart showing (non-preemptive) SJF schedulingand find average waiting time c) Draw a Gantt chart showing non-preemptive PRIORITY schedulingand find average turn- around time.

a) Draw a Gantt chart showing FCFS scheduling for these jobs and find average waiting time. b) Draw a Gantt chart showing (non-preemptive) SJF schedulingand find average waiting time c) Draw a Gantt chart showing non-preemptive PRIORITY schedulingand find average turn- around time.

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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Question

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Consider the following set of jobs to be scheduled for execution on a single CPU system.
Job Arrival Time Size (msec) Priority
10
2 (Silver)
1 (Gold)
3 (Bronze)
2 (Silver)
3 (Bronze)
1 (Gold)
J2
J3
J4
2
8
3
10
12
1
Je
15
4
a) Draw a Gantt chart showing FCFS scheduling for these jobs and find average waiting
time.
b) Draw a Gantt chart showing (non-preemptive) SJF schedulingand find average waiting
time
c) Draw a Gantt chart showing non-preemptive PRIORITY schedulingand find average turn-
around time.
d) Draw a Gantt chart showing preemptive PRIORITY schedulingand find average waiting
time.
e) Which of the foregoing scheduling policies provides the lowest waiting time
for this set of jobs? What is the waiting time with this policy?

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