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2 cards from this section. Quick, good the night before a test.
What is a dirty page?
Think about a page's state after it's been changed.
Describe what happens to reference bits at the end of an interval.
Consider what tracking is done during the interval.
What does a dirty page require before it can be replaced?
Think about what would happen if it were not written.
The second chance algorithm is a part of which broader category of algorithms?
Consider the principle of giving pages another chance.
Illustrate with an example how a sampled LRU could work differently from a basic LRU in a scenario with several repeated page accesses.
Consider how the usage over time might differ between the two.
Design a situation where Belady’s anomaly occurs and discuss the implications on selecting page replacement strategies.
Think of frame sizes and access sequences that interact unintentionally.
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