Practice Difference Between Interrupt Driven I/o And Dma Transfer (29.1.1) - Overview of DMA and Interrupt Driven I/O

Practice: Difference Between Interrupt Driven I/O and DMA Transfer

Lesson 29.1.1Overview 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 transfers without CPU involvement.
Question 2.
Name one disadvantage of interrupt-driven I/O.
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Consider how the CPU has to pause and switch tasks.
3Question 3.
What is one key advantage of DMA over interrupt-driven I/O?
- It requires more CPU involvement
- It allows simultaneous processing
- It makes data transfer slower
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Think about how CPU workload is affected.
4Question 4.
True or False: In DMA, a context switch is always required.
- True
- False
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Remember how DMA operates compared to interrupt-driven methods.
Question 5.
How would the use of DMA change if you had a real-time system where timing is critical?
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Consider the importance of processing speed in your explanation.
Question 6.
If you need to transfer 1 GB of data with a system that can only process 64 KB at a time, how many times would you expect DMA to take control?
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Focus on calculating total data divided by per-operation limits.

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