Practice I/O Command Issues - 25.2 | 25. Programmed I/O Overview | Computer Organisation and Architecture - Vol 3
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Knowledge

25.2 - I/O Command Issues

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is polling in the context of I/O operations?

💡 Hint: Think about how a teacher might check if students are ready before starting a class.

Question 2

Easy

What are the three types of commands used in I/O operations?

💡 Hint: Recall how each command serves a different purpose in managing devices.

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 the main downside of CPU polling for I/O device status?

  • It is efficient
  • It wastes CPU time
  • It is faster than interrupts

💡 Hint: Think about how a teacher's uninterrupted checking can hinder other classroom activities.

Question 2

True or False: In memory-mapped I/O, the same address space is used for memory and devices.

  • True
  • False

💡 Hint: Recall how both types of data storage use similar numbering schemes.

Solve and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

Analyze a scenario in a computer system where an I/O device fails to respond. What steps would you propose for the CPU to handle this situation effectively using programmed I/O and interrupts?

💡 Hint: Consider how program flow changes when a device response fails and the potential need for a recovery method.

Question 2

Design an instruction set for an isolated I/O model that incorporates a control command, a test command, and a read command for a hypothetical output device.

💡 Hint: Break down each phase into parts and outline how the commands will interact based on functionality.

Challenge and get performance evaluation