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Volatile memory

Hii,
All the computer lovers out there you must be knowing this fact that RAM is volatile memory.If not then today you would know.See a computer having 4gb ram means that it can support a software program of size 4gb or less at a time and not more than that.It stores the memory of a particular program for the time it runs and not after it stops.Thus the name volatile.ROM on the other hand stores all the history of activities performed.Thus it is non volatile.Now it must be clear.
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