12. If a system has 5 process that requires 100 msec of CPU bursts each. And the number of context switches was 20 times with 2 msec each. Then the CPU utilization of this system is equal to. A. 92.6 % (B) 100 % C. 96.1 % D. 80 % which states that at least one resource must be held in a non- > 13. One necessary condition for deadlock is sharable mode A hold and wait C. circular wait B. mutual exclusion D. no preemption Table for questions 18 and 19: The following processes are submitted to an operating system. Assume a CS of 0, 4 Process Arrival time CPU Burst time PO 1 78 6 PI 2 2 P2 1 P3 17 18. After you draw the Gantt Chart for this system using SRT (Shortest remaining time), SRT TPopi P21 Po 12 4 5 12 17 P3. ti Then the average waiting time, response time, turnaround time and the CPU utilization are: Average Waiting Tine 3/4 75% b. Average Tumaround Time 76% Average Response Time 23 % d. CPU Utilization 15/20 c. 19. After you draw the Gantt Chart for this system using RR, round Robin, with q-2, RR Po 7P2 Po Po Po 5 3 6 8 10 12 17 19 314 Then the average waiting time, response time, turnarounchtime and the CPU utilization are: Average Waiting Time 525 & 100% Average Turnaround Time 22 15 & Jools & Average Response Time- 100- Age CPU Utilization = 15/20 e 1. h waiting