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3 cards from this section. Quick, good the night before a test.
What does a reference bit indicate?
Think about what happens during a memory access.
What happens when a page with a reference bit of 0 is selected for replacement?
Consider what the dirty bit tells you.
What does a reference bit of 0 signify?
Think about what accessing a page means.
True or False: A dirty bit indicates that a page has been accessed.
Consider what it means for a page to be 'dirty' versus simply accessed.
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?
Focus on the reference and dirty bits when deciding.
Explain how the presence of dirty pages affects system performance in the context of the Modified Clock Replacement Algorithm.
Consider the implications for disk write operations.
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