Question

what are difference between primary memory and secondary memory

Answer 1

Difference Between Primary Memory & Secondary Memory

• Primary memory is directly accessible by Processor/CPU.
• Secondary memory is not directly accessible by CPU.

• Main memory
• Auxiliary memory

• Instructions or data to be currently executed are copied to main memory.
• Data to be permanently stored is kept in secondary memory.

• Primary memory is usually volatile.
• Secondary memory is non-volatile.

• Primary memories are made of semiconductors.
• Secondary memories are made of magnetic and optical material.

• Accessing data from primary memory is faster.
• Accessing data from secondary memory is slower.

• Primary memory is accessed by the data bus.
• Secondary memory is accessed by input-output channels.

• Primary memory is an internal memory.
• Secondary memory is an external memory.

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Answer 2

primary memory are the main memory of the computer system
secondary memory is the auxiliary memory
the data and instructions are erased as soon as the computer system is switched off in primary memory
data and instructions are stored for further use in secondary memory
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