Cache eviction policy

Cache eviction policy determines how a computer system decides which stored data to remove when the cache is full and new data needs to be added. Think of it like a bookshelf: when it's full, and you get a new book, you need to decide which existing book to take off. Different policies, like removing the least recently used or the least frequently accessed items, help optimize performance by keeping the most relevant data readily available. Proper eviction policies ensure faster access to important data and efficient use of limited cache space.