How do different page replacement algorithms compare?

What are the main page replacement algorithms used in operating systems?

The main page replacement algorithms include Least Recently Used (LRU), First-In-First-Out (FIFO), and Optimal Page Replacement.

Can you explain how the LRU algorithm works?

LRU keeps track of page usage over time and replaces the least recently used page when a new page is needed.

How does FIFO differ from LRU?

FIFO replaces the oldest page in memory, regardless of how often it has been used, while LRU focuses on usage frequency.

Which algorithm is generally considered the most efficient?

LRU is often considered more efficient in practice, but it can be more complex to implement compared to FIFO.