Common Question of Computer -By Tanbircox

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Computer Compute Computer Compute , , ,

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Computer 1. Input Device. , , , , 2. Central Processing Unit (CPU) 3. Output Device. , ,



Deference Between Computer & Human Being:

Analog Computer Digital Computer Hybrid Computer| Note : . . . . ,



Classification Of Digital Computer: Super Computer. Cray-1, Cyber-205.

Mainframe Computer. UNIVAC 1100/11, IBM 6120, NCR N8370, IBM 4341. Miniframe Computer. PDP 11, NOV A3, IBM S/34, IBM S/36. Micro Computer. , : Apple 64, IBM PC, TRS 80



() () Bit Binary Bi Digit t Bit 0 1 Bit Kilobytes (KB) & Megabytes (MB), Gigabytes (GB), Terabytes (TB) , 8 Bit= 1 Byte [1 Byte = 1 Character] 1024 Byte = 1 Kilobyte(KB) 1024 Kilobyte = 1 Megabyte (MB) 1024 Megabyte = 1 Gigabyte (GB) 1024 Gigabyte = 1 Terabyte (TB)

Speed of a Computer Measured by system clock frequency

Hz KHz = 1000 Hz



MHz = 1000,000 Hz GHz = 1000,000,000 Hz THz = 1000,000,000,000 Hz

MIPS (MILLION INSTRUCTIONS PER SECOND) is another measurement of cpu speed.

There are two parts of a Computert

, Hardware

Computer Hardware

Case Power Supply



Keyboard Power switch Mouse Reset switch

Scanner Hard drive Network card Floppy Modem CD/DVD Sound card Serial ports Video card Parallel port RAM USB port Motherboard Monitor Fan Printer Cables



What is Cabling For items in or attached to a system to work properly they must be securely connected.



What is Motherboard The motherboard's main job is to hold the computer's microprocessor chip and let everything else connect to it. Everything that runs the computer or enhances its performance is either part of the motherboard or plugs into it via a slot or port



Software :

, . ( memory) RAM, ROM| . ( memory) , ,

RAM (Random Access Memory) (Volatile) Input Device RAM , RAM - ( Write Memory) RAM



ROM (Read Only Memory) (Non Volatile) , Computer - ROM - , ,

Computer Disk Disk 1. Floppy Disk 2. Hard Disk. Disk Compact Disk (CD). : Floppy Disk:1.44 Megabyte (MB) [ For 31/2 Floppy Disk ] Compact Disk:150 Megabyte (MB) 800 Megabyte (MB) Hard Disk:15 Gigabyte (GB) 800 Gigabyte (GB) DVD Disk:700 Megabyte (MB) 12 Gigabyte (GB)

Operate () Operating System Operating System Operating System Operating System Operating



System , Operating System. , , , ,

GUI Dos

Windows Microsoft Corporation Operating System. Windows Operating System -Gi Application Software DOS (Disk Operating System) -Gi Application Software DOS Command DOS Command - Microsoft Corporation Windows Operating System Application Software Mouse Keyboard mg^q



Windows 98, Windows 2000, Windows ME. Windows XP. Windows NT. , , , ,

, Autoexec.bat, Config.sys

Casing Box Power Switch ON Folder/Icon Windows Desktop Screen

Power On Windows Operating System Screen Windows Operating System My Computer My Computer , My Documents My Computer Document



Recycle Bin Recycle Bin Recycle Bin Empty Taskbar Windows () Ber Windows Task Bar. Start Button Windows Taskbar START Operating System Shutdown, Run, Search/Find Programs, Documents, Settings Using of Start Button: , Opening Calculator: Start > Programs > Accessories > Calculator Opening a word processing program: Start > Programs > Accessories > WordPad Open Paint Program: Start > Programs > Accessories > Paint

Right Button New Folder



Enter

Folder Press Delete Key [ ] Yes Recycle Bin Right Button Yes

Folder Right Button Properties General OK

Start Shut Down Shut Down Choose OK AT Casing Its now save to turn off your computer ATX Casing Its now save to turn off your computer



How To Restart A Computer? Start Shut Down Restart Choose OK

- - Windows 95 keyboard -

1. Alphabetic key : A, B, C, D ...........Z 2. Numeric key : 0, 1, 2, 3, 4, ...........9 3. Function key : F1, F2, F3, F4 .........F12 4. Movement key : , , , 5. Special key : Home, Insert, End, Pause Break, Page Up, Page Down etc. 6. Command key : Alt (Alter), Ctrl (Control), SH (Shift)

Function Key : Key-board F1 F12 (Shift, Alt, Crtl key) mg^q

Alphabetic Key : Key-board A to Z

Numeric Key : Key-board !, @, #, $, %, ^, &, *, (, ) - (:) (;) Character Shift Key



Esc Key : Escape - Esc m^wjZ Escape Key, Cancel KeyI : Word Perfect

Shift Key : - Caps key off Capital Letter mg^q , -

Alt Key : Key-board Alt m^wjZ , mg^q

Ctrl Key : Ctrl - mg^q

Caps Lock Key : Caps or Caps Lock - Caps Lock Key. - Caps Lock, caps lock off Caps Lock on

Insert Key : Type Over mode off/on Insert Key Insert - Type over mode Type over mode Type over mode text text , bv^vi Insert Key

Enter Key :



Key-board , Alphabetic character bv^vi ,

Tab Key : - Shift Key

Backspace Key : Function Key F12 -

Delete Key : Key Board , , bv^vi , Numlock off

Arrow Key : Keyboard Spacebar Arrow -

1. Up Arrow Key () 2. Right Arrow Key () 3. Down Arrow Key () 4. Left Arrow Key ()

Arrow - Up Arrow

Print Screen Key : Display

Pause Key : Pause Button ; Pause Key



Home Key : Home - Ctrl+Home Go to bv^viwU

End Key : End

Page Up Key : Page Up

Page Down Key : Page Down

Spacebar Key : Keyboard j^vKwZi

Numeric Keypad : Keyboard Numeric Keypad. Num Lock Num Lock Key on Numeric Key Num Lock Key off Numeric Key Num Lock Key off Numeric key Shift Key Numeric Key Arrow Key Arrow Shift Key - Num Lock on Shift Arrow Key Numeric Numeric Keypad.



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Date post:	12-Jan-2016
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