Operating System

1. Four jobs are submitted to a computer center whose jobs average 80 percent I/O wait time. Table 2-1 shows the arrival and work requirements of four jobs. Assume that it uses round-robin scheduling. Table 1 : Arrival and work requirements of four jobs Job Arrival time CPU Minutes needed 1 10:00 4 2 10:10 3 3 10:15 2 4 10:20 2 Calculate the CPU utilization for 1 to 4 jobs with 80 percent I/O wait. Insert each value in the table and show the calculations. Table 2 : CPU utilization for 1-4 jobs with 80% I/O wait # Processes 1 2 3 4 CPU idle (I/O waiting) CPU utilization CPU time per Process Draw a graph that shows how much CPU time, in minutes, each job gets in each interval until all jobs are completed