Part 5 Computer memory | Primary Memory | Secondary Memory
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Computer memory is divided into primary and secondary memory. Primary memory, located on the motherboard, is further divided into RAM and ROM. RAM is volatile and loses its contents when power is lost, while ROM is non-volatile and retains its contents even without power. Secondary memory, like hard disks and USB drives, is used to store large amounts of data that cannot fit in primary memory and retains data permanently.
Part 5 Computer memory | Primary Memory | Secondary Memory
- 1. Computer memory refers to storage area where data is stored. It is of two types − Primary Memory Secondary Memory
- 2. Primary memory is the main memory of computer present in motherboard. Primary memory is of two types as shown in the image below. Primary memory Primary memory RAM (Random Access Memory) ROM (Read Only Memory)
- 3. (RAM)Random Access Memory RAM is referred as temporary memory, in which, information stored is lost once computer is turned off. It is a volatile memory. Instructions written in this memory can be modified; hence it is also known as programmable memory. The two types of RAM are Static RAM (faster and costlier) and Dynamic RAM. RAM (Random Access Memory) Static RAM Dynamic RAM
- 4. (ROM)Read Only Memory ROM is referred as permanent memory, in which information stored is available even if computer is turned off. Instructions stored in this memory can only be read and cannot be modified. Mostly ROM has a start-up instruction which is executed every time when computer is switched on. Types of ROM are PROM (Programmable Read Only Memory), EPROM (Erasable PROM), EEPROM (Electrically Erasable PROM) and flash memory.
- 5. Secondary memory Sometimes when data to be processed is large, it cannot fit in primary memory as it is limited, in such cases, we use supplement memory or secondary memory. Secondary memory helps to store information permanently and is non-volatile. Examples of secondary storage memory are compact disk, floppy disk, pen drive, external hard drive, etc.
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