Practice Categories Of I/o Commands (25.25.2.4) - Programmed I/O Overview

Practice: Categories of I/O Commands

Lesson 25.25.2.4Programmed I/O Overview

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9 questions

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6 sample questions

Question 1.
What is programmed I/O?
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Think about how the CPU interacts with devices.
Question 2.
Define control commands in the context of I/O.
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What role do these commands play in device management?
3Question 3.
What is the main disadvantage of programmed I/O?
- It is inefficient because of continuous polling.
- It is the fastest method.
- It requires less memory.
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Think about how often the CPU checks the status.
4Question 4.
True or False: In memory-mapped I/O, I/O devices have their own distinct address space.
- True
- False
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Consider how memory and devices are structured.
Question 5.
Design an algorithm for a CPU to handle I/O operations with both memory-mapped and isolated I/O devices. Explain how the algorithm differentiates between the two.
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Consider how the addressing affects data transfer in terms of setup and execution.
Question 6.
Evaluate the pros and cons of using programmed I/O versus direct memory access (DMA) for data transfers.
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Think about the implications each method has on CPU performance and efficiency.

5 more questions in this section. Enroll free to practise them all.