Computer memory is capable of storing any type of information for a long time. Humans can store huge amounts of data but may forget due to many factors, but a computer's memory remains forever until someone removes it.
All information in the computer is handled using electrical components such as integrated circuits and semiconductors, all of which can recognize only two states of an electrical signal, while I represents the presence of a signal.
Therefore, a bit is the smallest or most elementary bit of computer memory. A bit can store either a zero or a one. Since a single bit can store only four unique combinations,
Primary memory is also called the main memory. It is use for immediate access of data by the processor (CPU)
it is the memory that is in the silicon chips and fixed on the electronic circuit board , called motherboard present inside the CPU cabinet
There are two type OF PRIMARY MEMORY
Random access memory is also known as volatile. It means the information stored in the memory is lost when you turn off the computer or the power goes off.
It is directly accessed by the CPU it is the fastest memory of the computer.
The most common RAM size that you can find on computer and laptops are 2GB, 4GB, 8GB, soon.
Read only memory is also known as non- volatile memory, it retains the stored information even when the power has been switched off. It hold the startup instructions that prepare a computer for use. It also consists of programs that check the power off computer parts when you turn it on
Secondary memory is also known as auxiliary memory or external memory. It is used to store information permanently and for a longer period. Data is not lost in secondary memory even when the computer is turned off. Nowadays, many secondary storage devices are available that you can use as per your needs. Secondary storage devices refer to any non-volatile storage devices. They can be fixed internally or externally to the computer; they are also known as backup storage devices. They are used to store large amounts of data permanently. Hard discs, pen drives, CDs, DVDs, and Blu-ray discs.
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