Practice Test Items And Practical Applications (29.4) - Overview of DMA and Interrupt Driven I/O

Practice: Test Items and Practical Applications

Lesson 29.4Overview of DMA and Interrupt Driven I/O

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9 questions

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2 cards from this section. Quick, good the night before a test.
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6 questions · about 4 min · pass mark 70%. Hints available.
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3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is Direct Memory Access?
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Think about how data bypasses the CPU.
Question 2.
Explain the difference between burst transfer mode and cycle stealing mode.
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Consider which mode allows for more CPU activity.
3Question 3.
What is the main advantage of DMA over interrupt-driven I/O?
- More context switching
- Less CPU suspension
- Increased complexity
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Think about how CPU activities are changed during DMA usage.
4Question 4.
True or False: In burst transfer mode, the CPU is interrupted multiple times.
- True
- False
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Consider how burst operations handle data compared to cycle stealing.
Question 5.
You have a system using DMA to transfer 100MB of data. If the cycle stealing mode transfers 1KB at a time, how many interruptions occur during the transfer?
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Convert MB to KB to simplify calculations.
Question 6.
Design an experiment to compare the performance of burst mode vs. cycle stealing in a real-world application.
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Focus on measuring transfer times and CPU idle periods.

5 more questions in this section. Enroll free to practise them all.