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📝 Comparison of Implementation of the Access Matrix techniques

📖 From Operating System • 14. Protection • 12 questions available

Practice MCQs for Comparison of Implementation of the Access Matrix techniques. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-27

2
Easy Questions
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Medium Questions
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📝 Sample Questions

Q1. Domain D1 holds the copy right for read on file F2. Which action is D1 allowed to perform?

🔹 A. Delete the read right from D1's entry
🔹 B. Copy the read right into D3's entry for F2
🔹 C. Transfer ownership of F2 to D3
🔹 D. Grant execute right to D2

💡 Difficulty: easy | ✅ Correct: B

Q2. Which statement best distinguishes the copy, transfer, and limited copy rights in an access matrix?

🔹 A. Copy creates a permanent duplicate; transfer removes the original; limited copy creates a duplicate that cannot be further copied.
🔹 B. Copy and transfer are identical; limited copy only works for read rights.
🔹 C. Copy duplicates without removal; transfer moves the right and deletes it from the source; limited copy duplicates but blocks any subsequent copying of the new right.
🔹 D. All three rights behave the same except for owner rights.

💡 Difficulty: medium | ✅ Correct: C

Q3. How does allowing the transfer right instead of only the copy right affect the overall security of the system?

🔹 A. It reduces the number of rights in the matrix, making it easier to audit.
🔹 B. It increases the risk of rights being lost unintentionally, but does not change privilege escalation possibilities.
🔹 C. It enables a domain to move a right to another domain while removing it from itself, which can be used to delegate authority but also to hide the origin of a privilege.
🔹 D. It forces every domain to become an owner of all objects.

💡 Difficulty: hard | ✅ Correct: C

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🔗 Related Topics

📝 Goals of Protection in Operating System📝 Principles of Protection in Operating System📝 Domain of Protection in Operating System📝 Domain structure for protection in Operating System📝 UNIX example of protection in Operating System
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