Directions (Q96–100): Consider the following disk queue with requests for I/O to blocks on cylinders:
45, 81, 185, 33, 175, 99, 150, 77
(Consider that the head starts from location 58.)
What will be the total head movement of cylinders for the SSTF disk scheduling technique?
Pick an option to check yourself, or open the answer below.
Show answer & explanation
Correct answer: C. 177
Explanation
SSTF from 58: 45 (13), 33 (12), 77 (44), 81 (4), 99 (18), 150 (51), 175 (25), 185 (10). Total = 13 + 12 + 44 + 4 + 18 + 51 + 25 + 10 = 177.More System Software and Operating System questions
- What shall be the total head movement of cylinders if the FCFS disk scheduling method is used?
- Consider the following disk-scheduling movement and identify the algorithm it represents. Request queue: 84, 125, 11, 36, 170, 20, 172, 45…
- Match List I with List IIList I List II A. RAID level 1 I. Bit-interleaved parity organization B. RAID level 2 II. Disk mirroring C. RAID l…
- If the virtual memory size is 32 MB and the physical memory size is 4 MB with a page size of 2 KB, calculate the number of frames available…
- Which of the following does NOT interrupt a running process?
- Given the following processes with their burst times and priorities (lower number indicates higher priority), all arriving at time 0, what…