Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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1%£0 ll. I.
Y:-A
امنة على عمار هاشم - ....ex
Three processes P1, P2, and P3 arrive at time zero. The total time spent by the
process in the system is 10ms, 20ms, and 30ms respectively. They spent the first
20% of their execution time doing I/O and the rest 80% in CPU processing. What is
the AVERAGE WAITING TIME of the CPU using the FCFS, SJF, and RR scheduling
algorithms?
Process
Execution time
1/0 time
CPU time
P1
10
8
P2
20
4
16
P3
30
6
24
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Transcribed Image Text:1%£0 ll. I. Y:-A امنة على عمار هاشم - ....ex Three processes P1, P2, and P3 arrive at time zero. The total time spent by the process in the system is 10ms, 20ms, and 30ms respectively. They spent the first 20% of their execution time doing I/O and the rest 80% in CPU processing. What is the AVERAGE WAITING TIME of the CPU using the FCFS, SJF, and RR scheduling algorithms? Process Execution time 1/0 time CPU time P1 10 8 P2 20 4 16 P3 30 6 24
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