Practice Major Issues with Program I/O and Interrupt I/O - 29.4.1 | 29. Overview of DMA and Interrupt Driven I/O | Computer Organisation and Architecture - Vol 3
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29.4.1 - Major Issues with Program I/O and Interrupt I/O

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is DMA?

💡 Hint: Think about how devices communicate with CPU without direct intervention.

Question 2

Easy

What does context switching refer to?

💡 Hint: It happens in interrupt-driven I/O when the CPU is interrupted.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What is a primary advantage of using DMA over interrupt-driven I/O?

  • It requires less hardware
  • It does not require CPU intervention
  • It is faster in all cases

💡 Hint: Think about how each method utilizes CPU resources.

Question 2

True or False: Cycle stealing mode allows the CPU to have full control of the bus during DMA transfers.

  • True
  • False

💡 Hint: Recall how bus access is shared during data transfer.

Solve and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

You need to design a computer system that uses DMA. What factors will you consider to optimize performance?

💡 Hint: Think about the workloads and what configurations would maximize throughput.

Question 2

If a CPU can handle 8,000 I/O interrupts per second and a device needs to send 16 MB of data. Calculate how often the device would require the CPU's attention if using interrupt-driven I/O.

💡 Hint: Understand how to convert megabytes to bytes and then calculate interrupts. Divide the data by the size of each interrupt's handling capacity.

Challenge and get performance evaluation