Question

One of the following is not a Primary Memory :

• A. ROM
• B. RAM .
• C. DRAM
• D. Hard Disk

Answer 1

Answer:

D. Hard Disk

Primary Memory

• This memory is temporary memory.
• This memory is directly accessible by the computer’s Processor/CPU.
• The nature of Parts of this Primary memory varies because RAM- is volatile in nature while the ROM- Non-volatile.
• The devices of primary memory are more expensive than secondary storage devices.
• The memory devices used for primary memory are semiconductor memories.
• This memory is known as a device's main or internal memory.
• Example: RAM, ROM, Cache memory, PROM, EPROM, Registers, etc. are Examples.

Secondary Memory

• This memory is permanent memory.
• This memory is not directly accessible by the computer’s CPU.
• This memory is always Non-volatile in nature.
• The devices of secondary memory devices are not more expensive as compared to primary memory devices.
• The secondary memory devices are magnetic and optical memories.
• This memory is known as external memory or auxiliary memory of a device.
• Examples: Hard Disk, Floppy Disk, Magnetic Tapes, etc. are Examples.