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📝 Swap space use

📖 From Operating System • 10. Mass Storage Structure • 9 questions available

Practice MCQs for Swap space use. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-26

2
Easy Questions
5
Medium Questions
2
Hard Questions

📝 Sample Questions

Q1. A system receives disk I/O requests at cylinders 14, 37, 65, 67, 98, 122, 124, 183 with the read/write head currently at cylinder 53 and moving outward toward higher numbers. Using the SCAN algorithm, which cylinder will be serviced next?

🔹 A. 14
🔹 B. 65
🔹 C. 67
🔹 D. 183

💡 Difficulty: easy | ✅ Correct: B

Q2. Which statement best defines the C‑SCAN (Circular SCAN) disk‑scheduling algorithm?

🔹 A. The head moves back and forth, servicing requests in both directions.
🔹 B. The head moves from one end to the other, then jumps back to the start without servicing on the return.
🔹 C. Requests are served in the order they arrive.
🔹 D. The head always moves toward the nearest request.

💡 Difficulty: medium | ✅ Correct: B

Q3. Consider the same request set as in the previous question (10, 20, 30, 150, 160, 170) and a head at 120 moving toward higher numbers. Compute the total head movement for SCAN and for C‑SCAN. Which algorithm results in a smaller total movement?

🔹 A. SCAN moves 210 cylinders, C‑SCAN moves 310, so SCAN is smaller.
🔹 B. SCAN moves 340 cylinders, C‑SCAN moves 380, so SCAN is smaller.
🔹 C. SCAN moves 340 cylinders, C‑SCAN moves 260, so C‑SCAN is smaller.
🔹 D. Both move the same distance.

💡 Difficulty: hard | ✅ Correct: A

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🔗 Related Topics

📝 Magnetic disks📝 Solid state disks📝 Magnetic tapes📝 Disk Structure📝 Host attached storage
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