📝 Slab allocation in Kernel Memory

📖 From Operating System • 9. Virtual Memory • 15 questions available

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

🔄 Last updated: 2026-07-26

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📝 Sample Questions

Q1. A process requests a new stack page and the OS employs zero-fill-on-demand. Which description best matches the resulting physical memory state?

🔹 A. The page is copied from an existing page

🔹 B. The page is allocated and filled with zeros

🔹 C. The page retains data from the previous process

🔹 D. The page is left uninitialized

💡 Difficulty: easy | ✅ Correct: B

Q2. A developer notices that after forking a process, the child’s memory usage spikes unexpectedly. Which scenario most likely explains this behavior?

🔹 A. The child writes to many stack pages, triggering copy‑on‑write copies

🔹 B. The child immediately executes a different program via exec

🔹 C. The parent modifies shared library code

🔹 D. The OS uses lazy allocation for all pages

💡 Difficulty: medium | ✅ Correct: A

Q3. Which statement best describes why zero‑fill‑on‑demand pages improve security in an OS that uses copy‑on‑write?

🔹 A. They prevent accidental overwrites of shared pages

🔹 B. They ensure that newly allocated pages contain no residual data

🔹 C. They allow pages to be shared without copying

🔹 D. They speed up process creation

💡 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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