UGC NET CSE | June 2016 | Part 2 | Question: 38

Question

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

• A. 320
• B. 322
• C. 321
• D. 319

Answer 1

(98-32) + (98-37) + (37-14) +(124-14) + (124-65) + (67-65)

= 66+61+23+110+59+2

=321

Answer 2

Total disk movement = 66 + 61 + 23 + 110 + 59 + 2 = 321.
So, option (C) is correct.