two types of memory in a computer: RAM (Random Access memory) and ROM (Read
ROM (Read Only Memory) is used for
booting up the computer and to run initial diagnostics. Let us take an example, BIOS (basic input and
output system) is stored in ROM. BIOS controls everything when the computer is
switched on. It checks for hardware errors and load basic software before the
operating system takes the control. Simply it is a permanent memory setting
for starting the computer.
RAM ((Random Access Memory) load the
operating system and drivers for particular devices, load an application
program, create, change and store data and shut down the computer. Programs
are loaded in RAM that’s why we need to save the data often otherwise it loses
data when power is turned off.
RAM vs ROM
Stands for Random Access Memory
Stands for Read Only Memory
keeps operating system, application program, data in use
contains programs used for booting up the computer and to run initial
in RAM can be accessed in any order an can be modified (changed or deleted)
is fixed or data cannot be modified (read only memory)
memory holds data temporarily while the program is being used
is a fixed memory system and virtually indestructible
is volatile (It loses data when power is turned off)
is non-volatile (retains data even when power is off)
Higher units of space recommended up to GB (meant for running
Storage capacity not an issue as it is not used in running
RAM is fast
memory is extremely fast compared to ROM
Types of RAM-dynamic RAM & static RAM
of ROM: PROM (programmable read-only memory) like CD
ROM, EPROM, (Erasable Programmable Read-only Memory)
EEPROM.(Electrically Erasable Programmable Read-Only Memory) .
Example of RAM: RAM chips like 2GB, 4GB, 8GB etc of different companies
like Corsair, Kingston etc.
Example of ROM:
cartridge in video game consoles, computer BIOS.
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