Page 50 - 2619_PlusGPT V2.1_C-7

Random Access Memory (RAM)

RAM is a temporary memory. The information stored in this memory
is lost when the computer is turned off. That’s why it is also called
volatile memory. It stores data and instructions given by the user RAM
and also the results produced by the computer temporarily.

Types of RAM:
1. Dynamic RAM (DRAM): It requires continuous power to regularly refresh the data stored.

2. Static RAM (SRAM): It also requires constant power to hold on to data, but it doesn’t need to
be continually refreshed the way DRAM does.
However, SRAM is significantly faster and uses less power than DRAM.

Read-only Memory (ROM)

Information stored in ROM is permanent in nature, i.e., it holds the data
even if the system is switched off. It holds the starting instructions that
are required to start a computer. It is also called non-volatile memory.

ROM
Secondary Memory

This memory is permanent in nature and is not directly accessed by the CPU. It allows users to
store data that may be easily retrieved. It is cheaper as compared to primary memory.

Secondary memory devices are also called secondary storage devices. They are categorised into
three types: Magnetic disk, Optical disc and Flash drive.

Secondary Memory

Magnetic Disk Optical Disc Flash Drive

Hard Disk CD DVD Blu-ray Disc Pen Drive Memory Card

Magnetic Disk

A device, covered with a magnetic coating is called a magnetic disk. You can record and erase
data on a magnetic disk any number of times.

48 Premium Edition-VII