Memory refers to the physical devices used to store programs or data. Main memory is used for the information in physical systems which function at high speed (i.e. RAM), as compared to secondary memory, which are physical devices for program and data storage which are slow to access but offer higher memory capacity. The cache memory is an intermediate level between the main memory and the processor. The goal is to store the most frequently and most recently accessed data in the upper-level unit (cache) to make returning to it much faster. Can this concept be used in any real life applications? If so, give example(s) and discuss its use and advantages. List the limitations, considerations, and ways of optimizing memory hierarchy. Do all these also apply to your real life example? Why and why not?

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