Skip to main content

Block diagram of Computer:-

A block diagram of computer is also called basic diagram of computer or basic building block of computer

 A block diagram of computer consists three sub unit that is 







1. Input unit :- input unit is the set of various unit devices into a computer system input unit can be defined as "devices by which user can inset the data into a computer system is called input devices.

    In other word we can say that "devices by which user can send the data into a computer system.

 Example of input devices are :- Keyboard, Mouse,Joystick etc.
2. Storage Unit - Storage unit is also called memory unit , Memory unit deals with the set of various memory devices into a computer system memory unit can be defined as "devices to store data instruction program and processed it inside the computer system." 

 I.  ALU :-  An arithmetic logic unit (ALU) is a digital circuit used to perform arithmetic and logic operations. It represents the fundamental building block of the central processing unit (CPU) of a computer.
in other word we can say that ALU performs arithmetic operation like "Addition(+), Subtraction (-) Multiplication(*), Division(/) and logical operation like"YES, NO, TRUE, FALSE .


II. CU :- CU stands for "Control Unit" and control the execution of all kinds of program with generating control signals.

III. ALU+CU(Central processing unit) also called CPU it is also called brain of computer. Sometimes referred to simply as the central processor, but more commonly called processor.

 A central processing unit (CPU) is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logical, control and input/output (I/O) operations specified by the instructions.

 3. Output Unit :- Output unit is the set of various output devices into a computer system output unit can be defined as "devices by which user get desired output is called output devices.

 Example of output devices are :- Monitor, printer Plotter.etc 

Comments

Post a Comment

Popular posts from this blog

Introduction to Computer

COMPUTER- Basically the term COMPUTER is derived from "GREEK" word which means to calculate. Hence we can say that computer is a calculating device. In other word we can say that Computer is an electronic device which store data processing and give out the result. A computer is an electronic device which performs "Arithmetical and logical operation. A computer understood binary digit that is 0 and 1. Computer is an electronic device which accepts  data form user through input device and process the data with the help of processor after processing we desired output form. A computer also refereed as data processor because It can store the data, Process the data, and Retrieve data whenever desired. FULL FORM OF "COMPUTER" C-  Calculate O- Operate M- Machine P- Process U- User T- Trade E- Education R- Research
1 comment
Read more

Network Topology

Types of Network Connections Computer networks can be broken down historically into topology , which is a technique of connecting computers. The most common topology today is a collapsed ring. This is due to the success of a network protocol called the Ethernet. This protocol, or network language, supports the Internet, Local Area Networks, and Wide Area Networks. Star Topology A star topology is a design of a network where a central node extends a cable to each computer on the network. On a star network, computers are connected independently to the center of the network. If a cable is broken, the other computers can operate without problems. A star topology requires a lot of cabling. Bus Topology A bus topology is another type of design where a single cable connects all computers and the information intended for the last node on the network must run through each connected computer. If a cable is broken, all computers connected down the line cannot r...
Post a Comment
Read more

Number system and its types:-

Number system :- This is the medium by which we can represent the number into equivalent of different format when we type some letter or word the computer translate them a number because computer can understood only number. Types of number system      Positional number system      Non positional number system   Positional Number System: In positional number system, there are only a few symbols called digits, and these symbols represent different values depending on the position they occupy in the number. The value of each digit in such a number is determined by three considerations__ 1.        The digit. 2.        The position of the digit in the number. 3.        The base of the number system. Non-Positional Number System:  In the non-positional number systems, the characters used are I for 1, II for 2, etc, and are of...
Post a Comment
Read more