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Page Replacement Algorithm in Operating System Video Lecture | Crash Course for UGC NET Computer science
FAQs on Page Replacement Algorithm in Operating System Video Lecture - Crash Course for UGC NET Computer science
| 1. What is a page replacement algorithm in operating systems? |  |
Ans. A page replacement algorithm is a method used by operating systems to decide which memory pages to swap out of physical memory (RAM) and onto the disk when a page fault occurs.
| 2. What is the purpose of a page replacement algorithm? | |
Ans. The main purpose of a page replacement algorithm is to optimize memory usage by efficiently managing the limited physical memory available to the system.
| 3. What are some popular page replacement algorithms used in operating systems? | |
Ans. Some popular page replacement algorithms include FIFO (First-In-First-Out), LRU (Least Recently Used), Optimal, and Clock algorithms.
| 4. How does the FIFO page replacement algorithm work? | |
Ans. In the FIFO page replacement algorithm, the page that has been in memory the longest is replaced when a page fault occurs. It follows a queue-like structure where the page that was brought into memory first is the first to be replaced.
| 5. How does the LRU page replacement algorithm work? | |
Ans. In the LRU (Least Recently Used) page replacement algorithm, the page that has not been accessed for the longest period of time is replaced when a page fault occurs. It keeps track of the order in which pages are accessed and replaces the least recently used page.
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