Practice Dma Controller Context And Signals (29.2) - Overview of DMA and Interrupt Driven I/O

Practice: DMA Controller Context and Signals

Lesson 29.2Overview of DMA and Interrupt Driven I/O

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6 sample questions

Question 1.
What does DMA stand for?
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Think about the role of memory in data transfers.
Question 2.
Name one mode of transfer in DMA.
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Recall the two main ways of transferring data.
3Question 3.
What is the main advantage of using DMA over interrupt-driven I/O?
- It uses more CPU resources
- It allows CPU to continue processing
- It reduces data transfer speed
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Consider how each method utilizes CPU resources.
4Question 4.
True or False: In DMA mode, CPU is always busy.
- True
- False
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Think about the role of the CPU during a DMA operation.
Question 5.
Consider a system that uses burst transfer to transfer 10 MB of data. If the maximum transfer size is limited to 64 kB, how many complete transfers are necessary?
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Convert MB to KB before division.
Question 6.
Design an optimal data transfer system using DMA for a scenario where multiple devices need to send data to memory. What configurations would you consider and why?
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Think about the trade-offs between single and multiple DMA controllers.

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