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采用短作业优先调度算法(非抢占式),完成以下填空。(英文状态下输入,最多保留2位小数)答案:作业                  A               B               C                 D               E到达时间      10:00       10:20         10:30          10:35          10:40服务时间          25             30              10              20               15完成时间       (  填空1)   (  填空2 )    ( 填空3 )       ( 填空4  )      ( 填空5   ) 周转时间       (  填空6 )  (  填空7 )    ( 填空8 )       ( 填空9  )      ( 填空10 ) 带权周转时间(  填空11)  ( 填空12)   ( 填空13 )     ( 填空14)      (  填空15 )

Question

采用短作业优先调度算法(非抢占式),完成以下填空。(英文状态下输入,最多保留2位小数)答案:作业                  A               B               C                 D               E到达时间      10:00       10:20         10:30          10:35          10:40服务时间          25             30              10              20               15完成时间       (  填空1)   (  填空2 )    ( 填空3 )       ( 填空4  )      ( 填空5   ) 周转时间       (  填空6 )  (  填空7 )    ( 填空8 )       ( 填空9  )      ( 填空10 ) 带权周转时间(  填空11)  ( 填空12)   ( 填空13 )     ( 填空14)      (  填空15 )

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Solution

The question is asking to fill in the completion time, turnaround time, and weighted turnaround time for jobs A, B, C, D, and E using the Shortest Job Next (SJN) scheduling algorithm (non-preemptive).

The SJN scheduling algorithm selects the job with the smallest total time from the queue.

Here are the steps to solve this:

  1. Arrange the jobs according to their arrival time. If two jobs have the same arrival time, arrange them according to their service time.

  2. Calculate the completion time: This is the time at which process completes its execution. It is calculated as: Completion Time of a Process = Arrival Time of Process + Burst Time of Process + Waiting Time of Process

  3. Calculate the turnaround time: This is the total time taken by the process from getting to the ready state for the first time to its completion. It is calculated as: Turnaround Time = Completion Time – Arrival Time

  4. Calculate the weighted turnaround time: This is the ratio of turnaround time to the burst time. It is calculated as: Weighted Turnaround Time = Turnaround Time / Burst Time

Given the arrival times and service times, you can calculate the completion time, turnaround time, and weighted turnaround time for each job.

Please note that the exact answers would depend on the specific arrival and service times given in the question.

This problem has been solved

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