Computer memory is storage area which hold data or instructions in computer system. for an example if you start media player it loads from secondary storage (HDD) to primary memory (RAM) then CPU execute the program and gives us output (Play video or music).
Before you start must remember memory units-
| Memory | Quantity | Full Form |
|---|---|---|
| Bit | 0,1 | Bit |
| 4Bits | 1-Nibble | Nibble |
| 8Bits | 1Byte | Byte |
| 1024 Bytes | 1 KB | Kilo Byte |
| 1024 KB | 1 MB | Mega Byte |
| 1024 MB | 1 GB | Giga Byte |
| 1024 GB | 1 TB | Terra Byte |
| 1024 TB | 1 PB | Petta Byte |
| 1024 PB | 1 EB | Exa Byte |
| 1024 EB | 1 ZB | Zetta Byte |
| 1024 ZB | 1 YB | Yotta Byte |
What is difference between KB and Kb ?
Mostly in case of storage we uses the term KB. But in case of data transmission we uses Kb. KB means Kilo Byte and Kb means Kilo Bits. [ B=Byte (1 byte – 8000 bit ) | b=bit (1 bit – 1000 bit ) ].
Terminologies must need to remember-
Computer memory is divided into main (primary) memory and auxiliary (secondary) memory.
- Primary Memory- Main memory holds instructions and data when a program is executing.
- Secondary Memory- Secondary memory holds data and programs not currently in use and provides long-term storage.
The ability of storing data upon electric supply is divided into two types-
- Volatile memory- Volatile memory is computer storage that only maintains its data while the device is powered. Ex- RAM
- Non Volatile Memory- This memory does not lose content when power is lost. Ex- HDD
Memory Classification-
