What are cache replacement policies and why are they important?

What are cache replacement policies and why are they important?

Cache replacement policies determine how data is managed in cache memory, optimizing performance by deciding which data to keep or discard.

Can you explain some common cache replacement policies?

Sure! Common policies include LRU (Least Recently Used), FIFO (First In First Out), and LFU (Least Frequently Used). Each has its own advantages.

How does LRU work in practice?

LRU keeps track of the order in which items are accessed. When the cache is full, it removes the least recently used item to make space for new data.

What are the pros and cons of using FIFO?

FIFO is simple to implement and understand, but it can lead to suboptimal performance since it doesn't consider how often or recently data is accessed.