Function of RAM :
- RAM is the main memory in a computer .The data in RAM can be read (retrieved) or written (stored).
- It stores data and programs that can be accessed directly by the processor.
- RAM holds temporary instructions and data needed to complete tasks.This enables the computer's CPU to access instructions and data stored in the memory very quickly.
- RAM stores data during and after processing.
Function of ROM :
- ROM is another type of memory permanently stored inside the computer. ROM is non-volatile. It holds the programs and data when the computer is powered off .
- Programs in ROM have been pre-recorded. It can only be stored by the manufacturer ; once it is done ,it cannot be changed.
- Many complex functions such as start up operating instructions,translators for high-level languages and operating systems are placed in ROM memory.
- All the contents in ROM can be accessed and read but cannot be changed.
Differences between RAM and ROM :
Data and program
RAM
Stores during and after processing.
ROM
Stored by manufacturer.
Content
RAM
Stores information temporarily.
ROM
Stores information permanently.
Processing Time
RAM
Very fast, but uses a lot of power.
ROM
Fast ,but uses very little power.
Volatile
RAM
Volatility
ROM
Non-volatile
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ReplyDeleteIf ROM stores information permanently,then its not a primary storage device because primary storage devices store information temporarily.
ReplyDeleteIt's called a primary storage device because it's permanent azin it is not like secondary storage devices like flash disks which can be removed
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