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Computer General Knowledge important Terms and Definitions MCQS Notes

Computer General Knowledge important Terms and Definitions  MCQS Notes

RAM:
RAM stands for random access memory. It is that part of CPU where temporary information is stored.
Byte:
A group of 8 bits is called a byte.
Icons:
Pictorial objects on the desktop or screen are called Icons.
Mouse:
It is an input device, normally called a “Pointing device”. This device is used for pointing anything on monitor through a blinking cursor.
Software:
A set of instructions or codes written in a defined manner or prewritten programs which control the operations of computer.
Control Unit:
A unit of CPU which is responsible for all automatic operations carried out by the digital computers is called CU. The CU directs and coordinates all activities of a computer.
LAN:
LAN stands for local area network. It is privately owned communication network that serves users within a confirmed geographical area. The range is usually within a mile-perhaps one office, one building or a group of buildings.
WAN:
It stands for wide area network. It is a communication network that covers a wide geographical area. The range is usually a state or a country. Examples are Telenet, Uninet etc.
Modem:
Modem is abbreviation of Modulate-de-Modulate. Modulation is a process that converts digital signals into Analog form and Demodulation is a process that converts Analog signals into digital form. The device which performs modulation and demodulation is called a MODEM. In simple words it is a device that converts the digital signals into Analog and then back from Analog to digital form.
ALU:
A unit of CPU that performs arithmetic and logical operations is called ALU.
Register:
Registers are high-speed staging areas that temporarily store data during processing and provide working areas for computation.
Registers are contained in control unit and arithmetic Logic Unit. Following are the major types of registers:
i) Address Register
ii) Instructions Register
iii) Storage Register
iv) Accumulator Register
Soft Copy:
It displays the data on screen of monitor. It can be carried in a floppy disk. A change can be made in a soft copy.
Hard Copy:
The data is printed on paper card etc. with the help of printer. It cannot be carried in a floppy disk. No change can be made in hard copy

 

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