Day: March 7, 2015
Computer General Knowledge important Terms and Definitions MCQS Notes
RAM stands for random access memory. It is that part of CPU where temporary information is stored.
A group of 8 bits is called a byte.
Pictorial objects on the desktop or screen are called Icons.
It is an input device, normally called a “Pointing device”. This device is used for pointing anything on monitor through a blinking cursor.
A set of instructions or codes written in a defined manner or prewritten programs which control the operations of computer.
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 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.
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 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.
A unit of CPU that performs arithmetic and logical operations is called ALU.
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
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.
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
Computer General Knowledge UNITS OF CPU MCQS Notes
ALU(ARTHMETIC AND LOGICAL UNIT)
ALU is a part of CPU. Actual execution of instructions takes place in this part. All arithmetic and logical operations are performed in ALU. It consists of two units:
1. Arithmetic Unit
It performs basic arithmetic functions such as addition, subtraction, division.
2. Logical Unit
It performs logical operations like comparing two data items to find which data item is greater than, equal to, or less than the other.
• CONTROL UNIT
It acts like a supervisor of the computer. It does not execute program instruction by itself. It controls and coordinates all activities of computer system.
• Memory Unit (MU)
It is responsible for storage of data and information. The memory unit consists of two types of memory which are RAM and ROM.