Consider the disk request queue 82, 170, 43, 140, 24, 16, 190 with the initial head position at 50. What is the total head movement using FCFS scheduling?
Options
- A. 642
- B. 640
- C. 620
- D. More than one of the above
- E. None of the above
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Correct Answer (Detailed Explanation is Below)
A. 642
Detailed Explanation
Formula: Total movement = sum of absolute differences between consecutive positions. |82-50|+|170-82|+|43-170|+|140-43|+|24-140|+|16-24|+|190-16| = 642.
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