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UGC NET CSE | December 2012 | Part 2 | Question: 5 UGCNET-June2013-II: 47

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If the disk head is located initially at 32, find the number of disk moves required with FCFS if the disk queue of I/O blocks requests are 98. 37, 14, 124, 65, 67.

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  3. 321
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Acc. to FCFS algorithm, Total disk moves = (98-32) + (98-37) + ( 37- 14 ) + ( 124- 14 )+ ( 124 - 65) + ( 67-65 ) = 321

Ans- C. 321

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answer is 321
=|32-98|+|98-37|+|37-14|+|14-124|+|124-65|+|65-67|=321
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