📝 Principles of Protection in Operating System

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

Practice MCQs for Principles of Protection in Operating 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 definition of the principle of least privilege?

🔹 A. Every user must have administrator rights at all times.

🔹 B. Each program receives exactly the permissions needed to perform its intended function.

🔹 C. All processes share the same set of system privileges.

🔹 D. Privileges are granted only after a security audit.

💡 Difficulty: easy | ✅ Correct: A

Q2. A web server daemon runs with root privileges. An attacker exploits a bug and gains control of the daemon. Which outcome best illustrates the danger of not following least privilege?

🔹 A. The attacker can modify any file on the system, including system binaries.

🔹 B. The attacker can only read the server’s log files.

🔹 C. The attacker can restart the web service but cannot affect other processes.

🔹 D. The attacker is limited to sending malformed HTTP responses.

💡 Difficulty: medium | ✅ Correct: A

Q3. A system call interface offers functions A, B, C, and D. Function C allows a process to change its own UID to any user ID. Which function most clearly violates the principle of least privilege?

🔹 A. Function A: read a file

🔹 B. Function B: write to a log

🔹 C. Function C: change UID arbitrarily

🔹 D. Function D: query system time

💡 Difficulty: hard | ✅ Correct: B

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🔗 Related Topics

📝 Goals 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 📝 MULTICS example of protection in Operating System

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