In this video, we explain the FIFO (First-In, First-Out) Page Replacement Algorithm, a fundamental technique used in operating systems to manage memory and optimize performance. FIFO determines which memory pages to replace when the system runs out of physical memory.

Key Topics Covered:

What is the FIFO page replacement algorithm?
How FIFO works in virtual memory management
Step-by-step example of FIFO in action
Advantages and limitations of FIFO
Comparison with other page replacement algorithms (e.g., LRU, Optimal)
This video is ideal for computer science students, developers, or anyone interested in learning more about memory management techniques in operating systems.

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#Chapter5
#MemoryManagement
#PageReplacementAlgorithms
In an operating system that uses paging for memory management, a page replacement algorithm is needed to decide which page needs to be replaced when new page comes in.

Page Fault – A page fault happens when a running program accesses a memory page that is mapped into the virtual address space, but not loaded in physical memory.

Since actual physical memory is much smaller than virtual memory, page faults happen. In case of page fault, Operating System might have to replace one of the existing pages with the newly needed page. Different page replacement algorithms suggest different ways to decide which page to replace. The target for all algorithms is to reduce the number of page faults.
#FirstInFirstOut (FIFO) –
This is the simplest page replacement algorithm. In this algorithm, the operating system keeps track of all pages in the memory in a queue, the oldest page is in the front of the queue. When a page needs to be replaced page in the front of the queue is selected for removal.


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