Computer Systems (Senior CI) MCQ — Practice Questions for RAS Exam

A disk has cylinders numbered 0 to 199. The current head position is 50 and the pending queue is 82, 170, 43, 140, 24, 16, and 190. If SCAN scheduling is used and the head is initially moving toward higher-numbered cylinders, what is the total head movement after all requests are served?

In a preemptive uniprocessor RTOS, three periodic tasks have (execution time, period) as T1 = (1 ms, 4 ms), T2 = (2 ms, 5 ms), and T3 = (2 ms, 20 ms). If deadlines are equal to periods, which schedulability conclusion is most appropriate under Earliest Deadline First (EDF)?

Match the following – List –I A: Disk Scheduling B. Batch Processing C. Time Sharing D. Interrupt Processing List – II 1. Round Robin 2. Scan 3. LIFO 4. FIFO Code -

For the register-transfer statement R2 <- R1 in a synchronous CPU, which interpretation is correct?

When a process is in a “Blocked” state it waits for some I/O service. When the service is completed it goes to the -