Computers are electrical devices

Processing is the most important function performed by the computer

The set of devices used to give input to the computer is called

RAM Means

CPU means Central processing unit

Primary memory includes RAM and Hard disk

When the system is started by switching on the power supply it is called

When the system is already running and needs to be restarted or rebooted, it is called

What is BIOS

First Generation of computers uses Vaccume tubes

Integrated circuits were used in the second generation computers.

Microprocessors were first introduced in the third generation of computers.

Keyboards and monitors were introduced as input output devices from the second generation computers.

Mainframes are the fastest computers on the earth

Mainframes are faster than servers

Power supply component is responsible for converting the 240 volt AC mains power to low voltage DC

RAM is the short term memory that the computer uses to keep track of what it's doing.

Speakers are audio input device

In dynamic RAM each memory cell is made up of a capacitor and a transistor.

ROM is slower than RAM

Cache memory is the costliest and the fastest memory compared to RAM and ROM

RAM is Volatile

Secondary Memory is Non volatile

Secondary memory devices are cheaper compared to primary memory devices.

Instruction Register stores the instruction that is being executed.

Program counter(PC) register holds the address of the current instruction being executed.

Process management is done by operating system

Operating systems of desktop machine are stored in ROM

Entire operating system is loaded into RAM.