engineering recuitment GATE CSE 2023-24 Test Series Operating Systems CPU Scheduling Disk Scheduling
Suppose that the rotating disk head is moving with 200 tracks numbered from 0 to 199 and is currently serving a request at track 65. Disk queue requests are as follows: 93, 173, 132, 20, 35, 150, 100, 175 and 55.Which of the following statements satisfies these requests for the SSTF (Shortest Seek Time First) algorithm?
1
Total head movements = 250 cylinders
2
Total head movements = 200 cylinders
3
The request order is 65, 55, 35, 20, 93, 100, 132, 150, 173 and, 175
4
The request order is 65, 55, 93, 173, 132, 20, 35, 150, 100, and 175