Practice Problems With Polling (25.1.1) - Programmed I/O Overview - Computer Organisation and Architecture

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9 questions

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6 sample questions

Question 1.
What is polling?
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Think about how the CPU communicates with devices.
Question 2.
Name one disadvantage of polling.
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Consider what else the CPU might want to do.
3Question 3.
What is the primary issue with polling?
- It is fast
- It wastes CPU time
- It uses too much memory
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Think about what polling does to the CPU's time.
4Question 4.
True or False: Memory-mapped I/O allows for separate address spaces.
- True
- False
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Remember how the addressing schemes differ.
Question 5.
Explain how the CPU's inefficiency during polling can affect overall system performance.
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Consider performance impact on multitasking.
Question 6.
Design a scenario where isolated I/O would be more beneficial than memory-mapped I/O.
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Think about systems with multiple devices connected at once.

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