📝 Stack and buffer overflow

📖 From Operating System • 15. Security • 37 questions available

Practice MCQs for Stack and buffer overflow. 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. What is a buffer overflow in the context of program memory?

🔹 A. A condition where a buffer is accessed beyond its allocated size

🔹 B. A technique to encrypt data in a buffer

🔹 C. A method for optimizing buffer allocation

🔹 D. A process that frees memory automatically

💡 Difficulty: easy | ✅ Correct: A

Q2. In a typical 32‑bit system, how many bytes are overwritten if a function copies 260 bytes into a 256‑byte stack buffer and then returns?

🔹 A. 0 bytes

🔹 B. 4 bytes

🔹 C. 8 bytes

🔹 D. 12 bytes

💡 Difficulty: medium | ✅ Correct: B

Q3. Which of the following best describes why stack‑based buffer overflows are particularly dangerous for privilege escalation?

🔹 A. They allow overwriting global variables

🔹 B. They enable modification of the saved return address

🔹 C. They corrupt heap metadata structures

🔹 D. They cause denial‑of‑service by crashing the program

💡 Difficulty: hard | ✅ Correct: B

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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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