Practice Clearing Reference Bits - 19.2.2 | 19. Approximate LRU Implementation | Computer Organisation and Architecture - Vol 3
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19.2.2 - Clearing Reference Bits

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is a reference bit?

💡 Hint: It is part of the page management in memory.

Question 2

Easy

What happens when a page is accessed?

💡 Hint: Think about how we know a page was used.

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 does the reference bit indicate?

  • Whether a page has been modified
  • Whether a page has been accessed
  • Whether a page is dirty

💡 Hint: Think about what you need to know to manage page usage.

Question 2

True or False: A dirty page can be replaced without saving data back to disk.

  • True
  • False

💡 Hint: Consider what happens to modified data.

Solve 2 more questions and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

Analyze a scenario where you have four pages in memory: A, B, C, and D. If pages A and B are accessed frequently and C and D are rarely used, how would you configure your reference bits for each page, and what would your replacement strategy be?

💡 Hint: Think about how often pages are actually accessed versus how long they remain in memory.

Question 2

Design a simple simulation of the second chance algorithm using a small set of pages. Given pages A, B, C, and a new page D that needs to be brought into memory, demonstrate how the algorithm would process the page replacements.

💡 Hint: Follow the logical flow of replacement step-by-step, considering both the reference bit status and when to replace.

Challenge and get performance evaluation