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📝 Overlapped I/O operating system

📖 From Operating System • 20. Influential Operating Systems • 18 questions available

Practice MCQs for Overlapped I/O 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 primary capability does overlapped I/O provide to a program?

🔹 A. It allows I/O and computation to proceed simultaneously

🔹 B. It guarantees faster network latency

🔹 C. It eliminates the need for buffers

🔹 D. It converts asynchronous operations to synchronous ones

💡 Difficulty: easy | ✅ Correct: B

Q2. Why is a completion routine often used with overlapped I/O in event‑driven programs?

🔹 A. To block the thread until the I/O finishes

🔹 B. To periodically poll the device status

🔹 C. To notify the program immediately when the operation completes

🔹 D. To increase the size of the I/O buffer automatically

💡 Difficulty: medium | ✅ Correct: A

Q3. In a system that uses overlapped I/O, what is the main risk if the programmer forgets to reset the OVERLAPPED structure after each operation?

🔹 A. Data may be written to the wrong memory address

🔹 B. The CPU will overheat due to excessive context switches

🔹 C. The I/O device will shut down automatically

🔹 D. Network packets will be duplicated

💡 Difficulty: hard | ✅ Correct: A

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