Difference between RAM and ROM

1. Difference between the RAM and ROM:
Options RAM ROM
Stands for Random Access Memory Read Only memory
Definition Random Access Memory or RAM
is a form of data storage medium
that can be accessed randomly at
any time, in any order and from
any physical location., allowing
quick access and manipulation.
Read-only memory or ROM is a form of data
storage medium that permanently stores data on
personal computers and other electronic devices.
It contains the programming needed to start a
PC, which is essential for boot-up before the
system software loads; it performs major I/O
tasks and holds programs or software
instructions. In PCs, the instructions are read
from a small program in the ROM, called the
BIOS (Basic Input/Output System).
Accessibility In reference with the processor,
the information stored in the RAM
is easily accessed
The processor cannot directly access the
information that is stored in the ROM. In order
to access the ROM information, first the
information will be transferred into the RAM
and then it gets executed by the processor
Working type Both the read and write operations
can be performed over the
information that is stored in the
RAM
The ROM memory only allows the user to read
the information. User cannot make any changes
to the information.
Storage RAM memory is only used to
store the temporary information.
ROM memory is used to store permanent
information and cannot be deleted.
Speed the accessing speed of RAM is
faster, it assist the processor to
boost up the speed
Speed is slower in comparison with RAM, ROM
cannot boost up the processor speed
Data preserving Electricity is needed in RAM to
flow to preserving information
Electricity is not needed in ROM to flow to
preserving information
structure The RAM is an chip, which is in
the rectangle form and is inserted
over the mother board of the
computer
ROMs are generally the optical drivers, which
are made of magnetic tapes.
Cost The price of RAMs are
comparatively high
The price of ROMs are comparatively low
Chip size Physically size of RAM chip is
larger than ROM chip
Physically size of ROM chip is smaller than
RAM chip.
Types The RAM memory is categorized
into two types they are the:
Statistic RAM (SRAM) and
Dynamic RAM (DRAM)
The ROM memory is categorized into three
types, they are: PROM (Programmable Read
Only memory), EPROM (Erasable
Programmable Read Only memory) and
EEPROM (Electrically Erasable Programmable
Read Only memory)