computer have different type of memory like primary memory , Auxiliary memory , buffer memory , Cache memory , virtual memory ,

the work of all memory heterogeneously primary memory is directly communicate with the CPU . Auxiliary memory are used for storing the data for long time . Buffer memory are mainly used for storing the intermediate data between the travel . cache memory are used for storing the those data that currently required at process time for increase the speed of the data . virtual memory are put in between the two memory for increase the speed of data or instruction it means it put between HDD and RAM .