Practice Single Bus Configuration (29.1.5.1) - Overview of DMA and Interrupt Driven I/O

Practice: Single Bus Configuration

Lesson 29.1.5.1Overview of DMA and Interrupt Driven I/O

Practise this section

9 questions

Flashcard drill
4 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What does DMA stand for?
Show hintHide hint
Think about what DMA allows devices to do with memory.
Question 2.
Name one advantage of DMA over interrupt-driven I/O.
Show hintHide hint
Consider the CPU's workload during transfers.
3Question 3.
What is the main advantage of DMA over interrupt-driven I/O?
- It is slower
- It requires more CPU involvement
- It allows the CPU to perform other tasks during data transfer
- It eliminates the need for interrupts
Show hintHide hint
Think about the CPU's ability to multitask.
4Question 4.
True or False: In burst mode, the DMA transfers data in chunks over several cycles.
- True
- False
Show hintHide hint
Consider how burst mode operates compared to other modes.
Question 5.
If a CPU can handle one instruction every 10 nanoseconds and a DMA transfer takes 1 second for 1 MB of data, how many instructions can the CPU complete during one transfer?
Show hintHide hint
Think about how many cycles fit in that timeframe.
Question 6.
Devise a hypothetical performance metric assessing the efficiency of using DMA vs. interrupt-driven I/O in a single-bus system.
Show hintHide hint
Evaluate operational roles and timing conflicts in data transfers.

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