Practice Comparison Of Programmed I/o And Interrupt Driven I/o (27.5.1) - Interrupts and Processor Management

Practice: Comparison of Programmed I/O and Interrupt Driven I/O

Lesson 27.5.1Interrupts and Processor Management

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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 the I/O device.
Question 2.
Define interrupt-driven I/O.
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Consider how devices communicate with the CPU.
3Question 3.
What does programmed I/O require?
- Constant checking of device status
- High priority management
- Hardware interrupt mechanisms
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Think about how the CPU interacts with devices in this method.
4Question 4.
True or False: Interrupt-driven I/O allows devices to signal when they require CPU attention.
- True
- False
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Consider the name of the approach 'interrupt-driven'.
Question 5.
Design a system that effectively uses both programmed I/O and interrupt-driven I/O. Highlight use cases for each.
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Consider the speed, frequency of interaction and criticality of each task.
Question 6.
Discuss how the efficiency of a program could change by switching from programmed I/O to interrupt-driven I/O.
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Think about instances where responsiveness impacts user experience.

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