Practice Mapping I/o Devices (25.3.2) - Programmed I/O Overview - Computer Organisation and Architecture

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10 questions

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6 sample questions

Question 1.
What does programmed I/O mean?
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Think about how you wait for a bus.
Question 2.
What is memory-mapped I/O?
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Consider how data can be treated similarly for both memory and I/O.
3Question 3.
What is programmed I/O?
- A method using interrupts
- A CPU active polling process
- An automatic system task
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Think about how the CPU interacts with devices.
4Question 4.
Is memory-mapped I/O more efficient for device communication?
- True
- False
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Consider the ease of access to devices.
Question 5.
Design a scenario where programmed I/O could significantly slow down a system's performance and suggest a solution.
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What other methods can help in waiting without constant checking?
Question 6.
Explain how you would implement a control command for an I/O device that requires both reading data and checking its status.
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Think sequentially about what you need to do before reading data.

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