First In First Out

First In First Out (FIFO):
1. FIFO stands for First In First Out.
2. It is simplest page replacement technique.
3. In this technique, the oldest page is chosen as a victim for replacement.
4. A queue is used to main the pages in the memory.
5. The page present at the head position is removed and the new page is inserted at the tail position.
Advantages:
 It is easy to understand & execute.
Disadvantages:
 However, performance wise it’s not good.
 It suffers from Belady’s Anomaly which says that the page fault increases with the reduction in page frames.

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