Why would you select one replacement policy over another?

The choice of a replacement policy often depends on the specific workload and access patterns of the system. For instance, Least Recently Used (LRU) is effective for workloads with temporal locality, while First-In-First-Out (FIFO) can be simpler to implement and may work well in environments with predictable access patterns. Additionally, factors such as memory size, performance requirements, and the overhead of managing the replacement policy can influence the decision. Ultimately, the selected policy should optimize cache hits and reduce latency for the intended application.