Page fault page replacement operating systems OS

By: Prof. Dr. Fazal Rehman | Last updated: March 3, 2022

Page fault and page replacement in operating systems (OS)

In this tutorial, we will try to answer the following questions;

1. What is page fault?
2. Page replacement algorithm

What is page fault? If a process tries to get a page from memory and the page is not in memory, the page fault occurs. A page fault is a condition in which required page for a process is not in memory.

In the figure, PF means page fault, and PH means page hit. Page replacement algorithm Most famous page replacement algorithms are mentioned here;

1. First in, First out (FIFO) Page replacement algorithm.  Read More 
2. Optimal Page replacement algorithm.  Read More 
3. Least Recently Used (LRU) Page replacement algorithm.  Read More