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📝 Interrupts in I/O Hardware

📖 From Operating System • 13. I/O Systems • 26 questions available

Practice MCQs for Interrupts in I/O Hardware. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-27

6
Easy Questions
12
Medium Questions
8
Hard Questions

📝 Sample Questions

Q1. What is the primary purpose of an interrupt in a computer system?

🔹 A. To temporarily halt the CPU to service a device
🔹 B. To increase memory bandwidth
🔹 C. To synchronize clocks
🔹 D. To encrypt data

💡 Difficulty: easy | ✅ Correct: A

Q2. Why does using interrupts generally improve CPU efficiency compared to polling?

🔹 A. Interrupts let the CPU perform other work until a device signals, while polling wastes cycles checking idle devices
🔹 B. Polling reduces latency more than interrupts
🔹 C. Interrupts increase memory usage
🔹 D. Polling allows simultaneous device handling

💡 Difficulty: medium | ✅ Correct: A

Q3. Why must interrupt service routines be short and non‑blocking?

🔹 A. Because long routines improve system throughput
🔹 B. Because short routines prevent the CPU from missing other interrupts and avoid deadlock
🔹 C. Because they need to perform complex calculations
🔹 D. Because they must allocate large memory buffers

💡 Difficulty: hard | ✅ Correct: B

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🔗 Related Topics

📝 Overview of I/O Systems📝 I/O Hardware in I/O Systems📝 Polling in I/O Hardware📝 Direct memory access in I/O Hardware📝 I/O hardware summary
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