A disk scheduling system receives requests for the

Solution

The SCAN algorithm moves the disk head in one direction, servicing all requests until it reaches the end, then reverses direction. 1. Initial direction: upwards. 2. Sequence of servicing: 65 → 67 → 98 → 122 → 124 → (reverses) → 37 → 14. 3. After servicing 65, the next request in the upward direction is 67. Why Other Options Are Incorrect: • B) 14 & C) 37: These are serviced after the head reverses direction. • D) 98 & E) 122: These are serviced later in the upward direction, but after 67.