write a short note on memory unit
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write a short note on memory unit
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primary memory:- every computer comes with a certain amount of physical memory, usually referred to as main memory or primary memory for example RAM or ROM
secondary memory :- these types of memories are internal or external inside or outside the computer. It store programs and data permanently. it is slower but cheaper. Floppy disjs, hard drives, CD, DVD, pen drive etc are secondary storage devices. The secondary storage can be divided into megnetic device, optical device and flash memory.