Question

What is the main memory and what are the differences between RAM and ROM

Answer 1

Main Memory :

-> It is a Storage in a computer which is accessed directly by CPU(Control Process Unit).
-> Main memory is also called internal memory or Centeral storage that is Physical Memory
-> It is different from the External Storage that is usb,disk drives etc..,
-> Computer manipulate data only in Main Memory.

-> Main memory is very fast to process the data.
-> Every process is executed in Main memory.If any process to be done then computer fetch that process or application into main memory and perform actions.
-> In main Memory moving data and instructions very fast.
-> Data will not be permanent in Main memory.It will remove the data as speed as possible simply as long they are needed.

Difference between RAM and ROM :

ROM : Read Only Memory

Random Access Memory :

-> RAM stands for Random Access Memory.

-> RAM is a main memory to process the data also called volatile memory.

-> It process the data and stores temporary after process is done.I will remove the stored data.

->It needs flow of electricity to process the data

-> It is used both READ and WRITE

-> RAM is very fast but uses lot of electricity to process.

-> RAM will be in primary memory and also in CPU cache.

-> Data loss if power is lost suddenly.

-> RAM is available with high cost

-> RAM is large in size with higher capacity

Read Only Memory :

-> ROM stands for Read Only Memory

-> It stores the data permanently

-> ROM is also called Non volatile.Data in ROM will be safe even power last suddenly

-> It is used for only READ

-> ROM is available wih low cost.

-> ROM is small in size with less capacity

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