Which statement correctly describes the C-SCAN disk scheduling algorithm?

Options

  • A. The head services requests in both directions alternately
  • B. The head services requests in one direction and jumps back to the beginning after reaching the end
  • C. The head always selects the nearest request
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

B. The head services requests in one direction and jumps back to the beginning after reaching the end

Detailed Explanation

Explanation: C-SCAN (Circular SCAN) services requests in only one direction. After reaching the end of the disk, the head returns to the beginning without servicing requests during the return trip and continues servicing in the same direction.

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