📝 Trap door

📖 From Operating System • 15. Security • 9 questions available

Practice MCQs for Trap door. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-27

Easy Questions

Medium Questions

Hard Questions

Q1. What is a trap door (also called a backdoor) in computer security?

🔹 A. A: A hidden method that allows unauthorized access bypassing normal authentication

🔹 B. B: A type of firewall that blocks traffic

🔹 C. C: An encryption technique for data at rest

🔹 D. D: A network protocol for routing

💡 Difficulty: easy | ✅ Correct: A

Q2. Why do attackers prefer to install a trap door rather than rely solely on exploiting a vulnerability each time?

🔹 A. A: Trap doors are easier to detect

🔹 B. B: They provide persistent access even if the original exploit is patched

🔹 C. C: They require no privileges

🔹 D. D: They improve system performance

💡 Difficulty: medium | ✅ Correct: B

Q3. How does the principle of least privilege mitigate the risk posed by trap doors embedded in legitimate programs?

🔹 A. A: By allowing all programs full system access

🔹 B. B: By restricting program permissions so a compromised program cannot perform privileged actions

🔹 C. C: By encrypting all program code

🔹 D. D: By disabling user accounts

💡 Difficulty: hard | ✅ Correct: B

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