First Come First Service (FCFS)? Preemptive Shortest Job first? Round-Robin with time quantum of

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
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Assume that the following processes are the only processes in a computer system and that there are no input/output requests from all the given processes. Given the following arrival time and CPU burst time (also called service time) for each process, answer the following questions.

 

Draw the Gantt chart and compute the average waiting time for the following CPU scheduling algorithms of picture
 
First Come First Service (FCFS)?
Preemptive Shortest Job first?
Round-Robin with time quantum of 4 (Assume that new processes will be inserted at the end of the ready list ?
Process Arrival Time CPU Burst Time
20
3
7
P2
P3
P4
2
5
7
3
Transcribed Image Text:Process Arrival Time CPU Burst Time 20 3 7 P2 P3 P4 2 5 7 3
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