Practice Comparison Of Dma Transfer And Interrupt Driven Transfer (29.4.4) - Overview of DMA and Interrupt Driven I/O

Practice: Comparison of DMA Transfer and Interrupt Driven Transfer

Lesson 29.4.4Overview of DMA and Interrupt Driven I/O

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9 questions

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6 sample questions

Question 1.
What does DMA stand for?
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Think about the type of transfer that doesn't involve the CPU directly.
Question 2.
What is the key difference between DMA and interrupt-driven I/O?
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Consider how each method affects CPU workload.
3Question 3.
What is one major advantage of DMA over interrupt-driven I/O?
- DMA requires the CPU to manage transfers
- DMA does not interrupt CPU processing
- DMA is slower
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Which method keeps the CPU engaged in other operations?
4Question 4.
In cycle stealing mode, does the CPU get access to the bus?
- True
- False
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Think about how bus access is shared.
Question 5.
A file of size 10 MB is to be transferred using DMA in burst mode, where the maximum data count is 128 KB. How many burst transfers will be required?
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Break down the total size and see how many chunks fit into the maximum size.
Question 6.
In a system where interrupt-driven I/O management is used, what are potential bottlenecks resulting from frequent interrupts?
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Think about how many times the CPU has to give up its work for handling the interrupts.

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