📝 Trojan horse

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

Practice MCQs for Trojan horse. 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. Which of the following best defines a Trojan horse in computer security?

🔹 A. A program that appears legitimate but contains hidden malicious functionality.

🔹 B. A self-replicating program that spreads without user interaction.

🔹 C. A program that encrypts files and demands payment.

🔹 D. A network protocol that intercepts traffic.

💡 Difficulty: easy | ✅ Correct: A

Q2. An employee receives an email with an attachment named \invoice.pdf.exe\. Which response most likely indicates detection of a Trojan horse?

🔹 A. Blocking the attachment because of the .exe extension.

🔹 B. Running the file in a sandbox to see its behavior.

🔹 C. Deleting the email without analysis.

🔹 D. Forwarding the file to the IT security team for further inspection.

💡 Difficulty: medium | ✅ Correct: D

Q3. A security architect is designing a defense‑in‑depth strategy against Trojans that can also act as rootkits. Which layered control provides the most robust protection?

🔹 A. Deploying a host‑based intrusion detection system only.

🔹 B. Relying on network firewalls to block all inbound traffic.

🔹 C. Implementing application whitelisting, integrity monitoring, and privileged‑access management.

🔹 D. Disabling USB ports on all workstations.

💡 Difficulty: hard | ✅ Correct: C

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🔗 Related Topics

📝 The Security Problem in Operating System 📝 Program Threats in Operating System 📝 Trap door 📝 Logic bomb 📝 Stack and buffer overflow

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