Question

The main memory of a computer also consists of ROM,which is non volatile memory.still the main memory of a computer is often referred to as volatile memory. Why?

Answer 1

Hey there,
Actually the main memory is also known as RAM(Random Access Memory) .
Now I think telling differences between them will help to clear out the confusion.
ROM(Read only memory) chip is non-volatile storage and such it does not require power to retain information stored on it. When computer is turned off or is turned off than also a ROM chip will keep the information stored on it.
But unlike the RAM(Random access memory) chip is volatile and it requires a source of power to retain information. When computer is turned off or power cut happens than a RAM chip will lose the information stored on it.

Difference between volatile and non volatile
Non volatile memory is that require which doesn't require constant power to have information stored in it.
Volatile memory is that which requires constant power for information to be stored on it.
Main memory or which is also said as RAM is made of volatile memory because volatile memory is faster than non volatile memory and also we can say as I said above if something important or critical data is stored it will be automatically be deleted from memory.

Answer 2

Explanation:

When computer is turned off or is turned off than also a ROM chip will keep the information stored on it. But unlike the RAM(Random access memory) chip is volatile and it requires a source of power to retain information