Q1. Consider a set of 5 processes whose arrival time CPU time needed and the priority are given below [20 marks] Process Arrival time (in ms) CPU Time Needed (In ms ) Priority P1 0 10 5 P2 0 5 2 P3 2 3 1 P4 5 20 4 P5 10 2 3 Note: Smaller the number, higher the priority. Draw the Gantt chart illustrating the execution of these processes for each of the following CPU scheduling policy and also find the average waiting time in each case. I. First Come First Serve (FCFS) II. Shortest Job First (SJF) without pre-emption III. Shortest Job First (SJF) with pre-emption IV. Priority Scheduling without pre-emption V. Priority Scheduling with pre-emption

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Q1. Consider a set of 5 processes whose arrival time CPU time needed and the
priority are given below [20 marks]
Process Arrival time (in ms) CPU Time Needed (In ms ) Priority
P1 0 10 5
P2 0 5 2
P3 2 3 1
P4 5 20 4
P5 10 2 3
Note: Smaller the number, higher the priority.
Draw the Gantt chart illustrating the execution of these processes for each of the
following CPU scheduling policy and also find the average waiting time in each
case.

I. First Come First Serve (FCFS)
II. Shortest Job First (SJF) without pre-emption
III. Shortest Job First (SJF) with pre-emption
IV. Priority Scheduling without pre-emption
V. Priority Scheduling with pre-emption

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