单选题:Suppose that a disk drive has 50 cylinders, numbered 0 to 49. Th
Suppose that a disk drive has 50 cylinders, numbered 0 to 49. The drive is currently serving a request at cylinder 14, and the previous request was at a cylinder smaller than 14. The queue of pending requests is: 8, 15, 9, 35, 25, 30, 40,5. Please select the closest answer.
What is the total distance (in cylinders) that the disk arm moves to satisfy all the pending requests for C-LOOK? @[D](1)
A. 10
B. 20
C. 29
D. 30
A.10
B.20
C.29
D.30
答案:D
What is the total distance (in cylinders) that the disk arm moves to satisfy all the pending requests for C-LOOK? @[D](1)
A. 10
B. 20
C. 29
D. 30
A.10
B.20
C.29
D.30
答案:D