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The primary memory is further divided into two types:
1. Random Access Memory (RAM)
2. Read-Only Memory (ROM)
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 temporarily stores data and instructions
provided by the user, as well as the results generated
RAM
by the computer.
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 when you turn off the system. It holds
the instructions required to start a computer. It is also called
non-volatile memory. ROM
Secondary Memory
This type of memory is permanent in nature and is not directly accessed by the
CPU. It allows users to store data that can be easily retrieved. It is also cheaper
compared to primary memory.
Secondary memory devices are also called secondary storage devices. They are
categorised into three types:
Secondary Storage Devices
Magnetic Disk Optical Disc Flash Memory
Blu-ray Memory Solid State
Hard Disk CD DVD Pen Drive
Disc Card Drive
8 iPro (Ver. 4.1)-IV

