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Category > Management Posted 05 Oct 2017 My Price 8.00

batch jobs

44.    Five jobs are waiting to be run. Their expected run times are 9, 6, 3, 5, and X. In what order should they be run to minimize average response time? (Your  answer will depend on X.)

45.    Five batch jobs. A through E, arrive at a computer center at almost the same time. They have estimated running times of 10, 6, 2, 4, and 8 minutes. Their (externally de- termined) priorities are 3, 5, 2, 1, and 4, respectively, with 5 being the highest priority. For each of the following scheduling algorithms, determine the mean process turnaround time. Ignore process switching overhead.

 

 

(a)    Round robin.

(b)    Priority scheduling.

(c)    First-come, first-served (run in order 10, 6, 2, 4, 8).

(d)    Shortest job first.

For (a), assume that the system is multiprogrammed, and that each job gets its fair share of the CPU. For (b) through (d), assume that only one job at a time runs, until it finishes. All jobs are completely CPU bound.

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Maurice Tutor
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Status NEW Posted 05 Oct 2017 09:10 PM My Price 8.00

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