CCE 317: Operating Systems Chapter 5 - Memory Management
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Questions and Answers

What happens to the number of page faults in a demand paging system with LRU as the replacement algorithm?

  • Decreases (correct)
  • Remains the same
  • Unpredictable
  • Increases

What is the consequence of adding more memory to a system with certain types of page replacement algorithms?

  • Number of page faults decreases
  • It depends on the type of algorithm
  • Number of page faults increases (correct)
  • Number of page faults remains the same

What happens to the number of page faults when increasing memory (number of pages in main memory) in a system with LRU replacement algorithm?

  • Unpredictable
  • Remains the same
  • Increases
  • Decreases (correct)

What is the Clock Replacement Algorithm also known as?

<p>Second-Chance Algorithm (A)</p> Signup and view all the answers

What is the purpose of the use bit in the Clock Replacement Algorithm?

<p>To indicate the page has been referenced (A)</p> Signup and view all the answers

What happens when a page is replaced in the Clock Replacement Algorithm?

<p>The use bit is set to 0 (B)</p> Signup and view all the answers

What happens when the OS scans the buffer in the Clock Replacement Algorithm?

<p>The frame with use bit 0 is replaced (B)</p> Signup and view all the answers

What happens to the use bit during the search for replacement in the Clock Replacement Algorithm?

<p>It is set to 0 (D)</p> Signup and view all the answers

What is the performance of the Clock Replacement Algorithm compared to LRU?

<p>Close to that of LRU (C)</p> Signup and view all the answers

What is the purpose of the circular buffer in the Clock Replacement Algorithm?

<p>To consider the set of pages candidate for replacement (B)</p> Signup and view all the answers

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