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Suppose a disk has 201 cylinders, numbered from 0 to 200 : GATE - 2014(1)

Suppose a disk has 201 cylinders, numbered from 0 to 200. At some time the disk arm is at cylinder 100, and there is a queue of disk access requests for cylinders 30, 85, 90, 100, 105,110, 135 and 145. If Shortest-Seek Time First (SSTF) is being used for scheduling the disk access, the request for cylinder 90 is serviced after servicing ____________ number of requests.
 

Answer

ANSWER : (3)

EXPLANATION :


Request for cylinder is served after serving 3 requests (100, 105 and 110)
 

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