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📝 Page fault frequency in thrashing

📖 From Operating System • 9. Virtual Memory • 8 questions available

Practice MCQs for Page fault frequency in thrashing. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-26

2
Easy Questions
4
Medium Questions
2
Hard Questions

📝 Sample Questions

Q1. What is the name of the event that occurs when a process accesses a page that is not currently resident in memory?

🔹 A. page fault
🔹 B. segmentation fault
🔹 C. general protection fault
🔹 D. bus error

💡 Difficulty: easy | ✅ Correct: A

Q2. Why does the operating system check an internal table before deciding to terminate a process after a page fault?

🔹 A. to verify if the reference was to a valid address
🔹 B. to locate a free frame for the page
🔹 C. to schedule a disk read for the page
🔹 D. to update the process priority

💡 Difficulty: medium | ✅ Correct: A

Q3. A system uses a page‑fault frequency (PFF) monitor that swaps a process out if its fault rate exceeds 0.05 faults per millisecond. Process X generates 120 faults while executing for 2 seconds. Which action will the monitor most likely take?

🔹 A. Swap out Process X
🔹 B. Increase its priority
🔹 C. Allocate more frames to Process X
🔹 D. Ignore because the rate is below threshold

💡 Difficulty: hard | ✅ Correct: A

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🔗 Related Topics

📝 Basic concepts of Demand Paging📝 Performance of demand paging📝 Copy on Write in virtual Memory📝 Basic page replacement in virtual Memory📝 FIFO page replacement
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