uniti principle of abstractionabstraction is the process of trying to identify the most important or inherent qualities of an object or modeland ignoring or omitting the unimportant aspects (information hidingit consists of two partsdata and operations memory hierarchy memory hierarchy is the hierarchy of memory and storage devices found in computer system it ranges from the slowest but high capacity auxiliary memory to the fastest but low capacity cache memory needthere is trade-off among the three key characteristics of memory namely department of csevishnu institute of technology