primary memory

  memory is used to hold programs and data during execution. primary is often called as RAM ( random access memory ) it holds all the programs and data the processor is using at a given time . RAM is volatile because its contents are erased when power is switched off.

the other  type of system memory is ROM ( read only memory ) which is permanent because it contents are not erased even when power is switched off. it is usually used to load an operating system.


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