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Previous Year Question (PYQs)

Which disk scheduling algorithm looks forthe track closest to the current head position? 
1. LOOK 
2. SSTF 
3. FCFS 
4. SCAN




Solution

Explanation:

  • SSTF (Shortest Seek Time First): Always serves the request that requires the minimum head movement from the current head position.

  • LOOK/SCAN: Move in one direction (like elevators), serving requests along the way.

  • FCFS: Serve requests in the order they arrive.

✅ Hence, SSTF is the correct choice.


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