Practice Operation Procedure From Memory To Disk (29.2.2) - Overview of DMA and Interrupt Driven I/O

Practice: Operation Procedure from Memory to Disk

Lesson 29.2.2Overview of DMA and Interrupt Driven I/O

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6 sample questions

Question 1.
What is interrupt-driven I/O?
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Think about how the CPU reacts to I/O operations.
Question 2.
What does DMA stand for?
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Recall what DMA allows devices to do.
3Question 3.
What happens during interrupt-driven I/O?
- CPU is interrupted
- I/O occurs without interruption
- DMA takes over completely
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Think about what interrupts imply.
4Question 4.
True or False: DMA allows data transfers without CPU intervention.
- True
- False
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Consider the role of the CPU during DMA.
Question 5.
Imagine a system where the CPU needs to process 10,000 small data packets of 512 bytes each. If using DMA, analyze how different transfer modes would affect processing speed and efficiency.
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Think about how quickly the data can come and go in each mode.
Question 6.
Given a scenario with a 32-bit processor needing DMA for 1 GB of data, calculate how many transactions would be necessary based on a 64 KB maximum payload per transaction.
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Divide the overall data size by individual transaction capacity!

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