📝 Access control in Linux System

📖 From Operating System • 18. The Linux System • 16 questions available

Practice MCQs for Access control in Linux System. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-27

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📝 Sample Questions

Q1. What is the primary purpose of the route‑caching table in the IP subsystem?

🔹 A. To store wildcard routes for quick lookup

🔹 B. To cache specific destination routes for faster retrieval

🔹 C. To maintain firewall rule chains

🔹 D. To manage fragment reassembly

💡 Difficulty: easy | ✅ Correct: A

Q2. Why does the forwarding information base (FIB) search the tables containing the most specific routes before less specific ones?

🔹 A. Because specific routes are stored in faster memory

🔹 B. To ensure longest‑prefix match and correct forwarding

🔹 C. To reduce the number of hash collisions

🔹 D. Because wildcard entries are prioritized

💡 Difficulty: medium | ✅ Correct: B

Q3. Explain the relationship between an ipfrag object and an ipq structure during IP fragment reassembly.

🔹 A. ipfrag objects are temporary buffers for individual fragments, while ipq groups them for a single datagram

🔹 B. Each ipfrag represents a complete datagram and ipq stores fragments

🔹 C. ipq holds routing information and ipfrag holds firewall rules

🔹 D. ipfrag and ipq are unrelated components

💡 Difficulty: hard | ✅ Correct: A

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🔗 Related Topics

📝 Linux History 📝 The Linux kernel 📝 The Linux system 📝 Linux distributions 📝 Linux licensing

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