UGC-NET | UGC NET CS 2014 Dec – III | Question 51

Consider an imaginary disk with 40 cylinders. A request come to read a block on cylinder 11. While the seek to cylinder 11 is in progress, new requests come in for cylinders 1, 36, 16, 34, 9 and 12 in that order. The number of arm motions using shortest seek first algorithm is
(A) 111
(B) 112
(C) 60
(D) 61


Answer: (D)

Explanation:
1 + 3 + 7 + 15 + 33 + 2 = 61.
So, option (D) is correct.

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