Difference between primary memory and secondary memory

1.	Difference between primary memory and secondary memory
Answer» \tParameterPrimary memorySecondary memoryNatureThe primary memory is categorized as volatile & nonvolatile memories.The secondary memory is always a non-volatile memory.AliasThese memories are also called internal memory.Secondary memory is known as a Backup memory or Additional memory or Auxiliary memory.AccessData is directly accessed by the processing unit.Data cannot be accessed directly by the processor. It is first copied from secondary memory to primary memory. Only then CPU can access it.FormationIt\'s a volatile memory meaning data cannot be retained in case of power failure.It\'s a non-volatile memory so that that data can be retained even after power failure.StorageIt holds data or information that is currently being used by the processing unit. Capacity is usually in 16 to 32 GBIt stores a substantial amount of data and information. Capacity is generally from 200GB to terabytes.AccessesPrimary memory can be accessed by the data bus.Secondary memory is accessed by I/O channels.ExpensePrimary memory is costlier than secondary memory.Secondary memory is cheaper than primary memory.\t

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