From lecture, there're some bits in the tag part used to select set. In a 2-way associative cache, we need 1 bit, and a 4-way needs 2 bit and so on.

In these caches (write allocate, write back), is there any specific way the cache selects a location to place the line in the cache? Or is that similar to any other caches where programmer decides e.g. like LRU, MRU