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📝 Polling in I/O Hardware

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

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

🔄 Last updated: 2026-07-27

3
Easy Questions
7
Medium Questions
3
Hard Questions

📝 Sample Questions

Q1. What is the primary purpose of polling in computer I/O?

🔹 A. Continuously checking a device's status
🔹 B. Sending interrupt signals
🔹 C. Allocating memory
🔹 D. Encrypting data

💡 Difficulty: easy | ✅ Correct: A

Q2. How does a daisy‑chain configuration affect the polling process for multiple devices on the same bus?

🔹 A. It allows the CPU to poll each device sequentially using the same port
🔹 B. It requires each device to generate its own interrupt
🔹 C. It eliminates the need for polling entirely
🔹 D. It forces devices to operate at the same speed

💡 Difficulty: medium | ✅ Correct: C

Q3. Consider a bus that supports both DMA and polling. Why might polling still be preferred for a device that transfers small, irregular packets?

🔹 A. Overhead of setting up DMA outweighs benefits for tiny transfers
🔹 B. Polling can compress data better
🔹 C. DMA cannot operate on that bus type
🔹 D. Polling automatically encrypts the packets

💡 Difficulty: hard | ✅ Correct: A

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🔗 Related Topics

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