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📝 Buddy system in Allocating Kernel Memory

📖 From Operating System • 9. Virtual Memory • 11 questions available

Practice MCQs for Buddy system in Allocating Kernel Memory. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-26

2
Easy Questions
6
Medium Questions
3
Hard Questions

📝 Sample Questions

Q1. What does the copy‑on‑write technique do when a process attempts to write to a shared page?

🔹 A. It immediately copies the page for both processes.
🔹 B. It delays copying the page until a write occurs.
🔹 C. It deletes the shared page and allocates a new one.
🔹 D. It marks the page as read‑only without copying.

💡 Difficulty: easy | ✅ Correct: B

Q2. A child process modifies a stack page after a fork that uses copy‑on‑write. Which physical page does the child receive?

🔹 A. A new copy of the parent’s page A
🔹 B. A copy of the original page C
🔹 C. The original page C without copying
🔹 D. A shared copy of page B

💡 Difficulty: medium | ✅ Correct: B

Q3. Parent process has pages A, B, C. After a fork with copy‑on‑write, the child writes to page B. What is the final state of page B in both processes?

🔹 A. Both now reference the same physical page B.
🔹 B. Parent keeps original B, child gets a private copy of B.
🔹 C. Both get new private copies of B.
🔹 D. Parent’s B is discarded and only child’s copy remains.

💡 Difficulty: hard | ✅ Correct: B

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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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