When cache memory is full what happen?

When cache memory is full, the system must decide which data to evict to make space for new data. This process is typically managed using a cache replacement policy, such as Least Recently Used (LRU) or First In First Out (FIFO). As a result, the cache may lose frequently accessed data, potentially leading to increased access times as the system fetches data from slower main memory. This can degrade overall performance if cache hits decrease significantly.