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Consider the following set of jobs with their arrival times, execution time (in minutes), and deadlines.

Job Ids	Arrival Time	Execution time	Deadline
1	0	5	5
2	1	15	25
3	3	12	10
4	7	25	50
5	10	5	12

Calculate the mean turn-around time, the mean weighted turn-around time and the throughput for SJN.

Chart for Shortest Job next scheduling (SJN)

1	3	5	2	4
0 5 17 22 37 62

Turnaround time for different jobs is

For job 1, T1 = 5-0=5 unit time

For job 2, T2 = 37-1=36 unit time

For job 3, T3 = 17-3=14 unit time

For job 4, T4 = 62-7=55 unit time

For job 5, T5 = 22-10=12 unit time

Mean turnaround time, Tm = (T1+T2+T3+T4+T5)/5= 122/5= 24.4unit time/job

Throughput= no of process completed per unit time= 5/62= 0.081 jobs/unit time.

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Computer Engineering, Engineering

Category:- Computer Engineering
Reference No.:- M9544467

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