Practice Direct Memory Access (dma) (24.6.3) - External Devices and Their Types

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6 sample questions

Question 1.
Define DMA.
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Think of how devices communicate with memory.
Question 2.
What is programmed I/O?
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What happens when the CPU waits for devices?
3Question 3.
What does DMA stand for?
- Direct Memory Access
- Dynamic Memory Allocation
- Dual Module Access
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Look at how devices communicate with memory.
4Question 4.
Is programmed I/O more efficient than DMA?
- True
- False
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Consider how each method utilizes CPU resources.
Question 5.
Design a hypothetical system where DMA significantly improves performance. Discuss the components involved and their interactions.
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Consider how video streaming demands high throughput and how DMA facilitates that.
Question 6.
Analyze a scenario where DMA could lead to data corruption. What mechanisms can be implemented to prevent this?
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Think about the risks involved when multiple devices work with the same data.

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