Practice Reference Byte Mechanism (19.2.1) - Approximate LRU Implementation
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Reference Byte Mechanism

Practice - Reference Byte Mechanism

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Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What is a reference bit?

💡 Hint: Think about how we track usage of pages.

Question 2 Easy

Explain FIFO in page replacement.

💡 Hint: This method prioritizes age, not usage.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What does the reference bit indicate?

Accessed recently
Not accessed
Uncertain

💡 Hint: How does the operating system keep track of active memory usage?

Question 2

True or False: The FIFO page replacement strategy is the most efficient method.

True
False

💡 Hint: Think about the principles of page replacement.

2 more questions available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Design a scenario that demonstrates Belady's anomaly with specific memory access patterns.

💡 Hint: Use a simple sequence with predictable page accesses.

Challenge 2 Hard

Critically analyze the performance differences between the reference byte mechanism and direct LRU implementations. What are the key trade-offs?

💡 Hint: Consider the hardware limitations against performance optimization.

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