📝 Virus protection

📖 From Operating System • 15. Security • 16 questions available

Practice MCQs for Virus protection. 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

📝 Sample Questions

Q1. A system administrator discovers that the .rhosts file on a Unix server contains entries allowing password‑less logins from several hosts. Which security risk does this create?

🔹 A. Unauthorized remote execution via rsh without password

🔹 B. Encryption of all network traffic

🔹 C. Automatic virus scanning

🔹 D. Mandatory two‑factor authentication

💡 Difficulty: easy | ✅ Correct: A

Q2. What primary function does the Unix \finger\ utility provide to users?

🔹 A. List running processes

🔹 B. Display user login information and contact details

🔹 C. Transfer files between hosts

🔹 D. Manage printer queues

💡 Difficulty: medium | ✅ Correct: B

Q3. How did the use of three distinct infection mechanisms in the Morris worm complicate detection and mitigation efforts?

🔹 A. It reduced the worm’s overall size

🔹 B. It required multiple signatures and patches

🔹 C. It limited the worm to a single operating system

🔹 D. It made the worm immune to all firewalls

💡 Difficulty: hard | ✅ Correct: A

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🔗 Related Topics

📝 The Security Problem in Operating System 📝 Program Threats in Operating System 📝 Trojan horse 📝 Trap door 📝 Logic bomb

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