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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
by the computer.
RAM
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 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:
Secondary Storage Devices
Magnetic Disk Optical Disc Flash Memory
Blu-ray Memory Solid State
Hard Disk CD DVD Pen Drive
Disc Card Drive
Magnetic Disk
A hard disk covered with a magnetic coating is called a Magnetic disk. You can
record and erase data on a magnetic disk any number of times.
8 iPRIME (Ver. 2.2)–IV

