Practice Modified Clock Replacement Algorithm (19.5) - Approximate LRU Implementation
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Modified Clock Replacement Algorithm

Practice - Modified Clock Replacement Algorithm

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Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What does a reference bit indicate?

💡 Hint: Think about what happens during a memory access.

Question 2 Easy

What happens when a page with a reference bit of 0 is selected for replacement?

💡 Hint: Consider what the dirty bit tells you.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What does a reference bit of 0 signify?

The page has been accessed
The page has not been accessed
The page is dirty

💡 Hint: Think about what accessing a page means.

Question 2

True or False: A dirty bit indicates that a page has been accessed.

True
False

💡 Hint: Consider what it means for a page to be 'dirty' versus simply accessed.

1 more question available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Given a scenario where you have 5 pages with the following states: Page 1 (0,0), Page 2 (0,1), Page 3 (1,0), Page 4 (1,1), and Page 5 (0,0). Which page(s) would the Modified Clock Algorithm choose to replace first and why?

💡 Hint: Focus on the reference and dirty bits when deciding.

Challenge 2 Hard

Explain how the presence of dirty pages affects system performance in the context of the Modified Clock Replacement Algorithm.

💡 Hint: Consider the implications for disk write operations.

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