Difference of cache memory and normal memory?

Answer 1

A cache memory is a component that stores data so that future requests for that data can be served faster. The data that is stored within a cache might be values that have been computed earlier or duplicates of original values that are stored elsewhere.

Primary memory (often referred to simply as memory) is the only one directly accessible to the CPU. The CPU continuously reads instructions stored there and executes them as required. Any data actively operated on is also stored there in uniform manner. RAM is one commonly used primary memory.

Answer 2

Cache memory is very high-speed memory that resides on the CPU or the hard drive. It's used either to remember what was just read from regular memory, or it can be used to pre-fetch information that it thinks it will need shortly.

Normal memory is slower than cache memory because it is not only physically separated from the CPU or hard drive, but the data also has to go through the memory controller.

An example of cache memory on a hard drive would be reading large sequential files, such as a movie. The hard drive (if the cache is running as it should) would say "Oh, the system is reading this movie, I will pre-load the next few tracks into cache memory because they'll want that next" which allows for faster data access because the hard drive can then deliver the information from the cache memory instead of having to wait until the platters spin around to get the next piece of information.

Answer 3

yes