1.The Basic:
what is a computer machine??
A computer is an electronic device that process into useful information.
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what is data?
The raw facts and figures (numbers) that convey no information is called a data.
example: a, red ,cost, car this all is raw form.
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what is Information?
The processed facts and figures are called imformation.
example:like,a red BMW car’s cost is 50 lakh.
so,this is called information.
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what are the physical parts of computer?
a.computer is divided into three parts :
1.Input device.
2.Processing device.
3.Output device.
b.These are also known as:
1.Input unit.
2.Processing unit.
3..Output unit.
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Input unit.
we give input to the computer by using input devices or input.
example:Mouse,keyboard {the mouse and keyboard are the most common input devices} ,joystick, digital pen,etc .
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Processing unit.
This unit is also known as the “Brain of the computer”,because it does all processing of computer.
processing unit further has two main parts:
1.control unit.
2.ALU(Arithmatic and logical unit).
3.Memory.
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a.control unit:
it control’s all the components and functions of computer system.
b.ALU:
This component controls all the mathematical and logical functions in the computer sysytem.
(logical means true/false.)
c.Memory:
(Memory is a place where computer store’s its data.)
It is also a main part of processing unit and used for storeing the memory.
memory has also two parts:
1.internal memory.
example:ram,rom.
2.external memory.
example:SD card,hard disk,pandrive,etc.
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output unit.
It is a part of computer that gives us aprocessed information.
example:monitor,speakers,printer’s,etc.
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What is the principle of computer?
It works on the principle of “IPO cycle(input=process=output)”.
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