Practice Reference Bit Mechanism - 19.1.1 | 19. Approximate LRU Implementation | Computer Organisation and Architecture - Vol 3
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Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What does a reference bit signify?

💡 Hint: Think about tracking usage.

Question 2

Easy

What happens to reference bits at the end of a time interval?

💡 Hint: Consider periodic updates.

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 is in memory
  • Whether a page has been accessed
  • The write state of a page

💡 Hint: It's about tracking access rather than physical location.

Question 2

True or False: A dirty page needs to be written back to the disk before it can be replaced.

  • True
  • False

💡 Hint: Consider what happens when changes are made.

Solve 2 more questions and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

Consider a system with a page size of 4KB. If 10 pages are accessed in sequential order across three frames, compute the total number of page faults using FIFO and Clock algorithms. Show your results and comparisons.

💡 Hint: Keep track of which pages are currently in memory.

Question 2

Create a scenario illustrating Belady's Anomaly with a specific reference string and demonstrate the difference in page fault rates between 3 and 4 page frames.

💡 Hint: Document which frames are replaced in each algorithm.

Challenge and get performance evaluation