1..what is computer?
Ans- computer is an electronic device which accept data by the input device and it processing by the central processing unit(cpu) and produce data by the output device.
2...HARDWARE :-the physical part of the computer is called hardware components the name suggest which is actually hard and we can also be touch.example -monitor, keyboard, CPU
3..SOFTWARE :-software is a programming system only we can sea never touch.example-mouse pointer
4..CHARECTERIES IS A COMPUTER SYSTEM?
1..speed 2..accuracy 3..storage
3..diligence 4..versatility
U. P. S -:uniter power supply
C. P. U :-central processing unit
V. D. U:-vitual diskplay unit
C. U :-control unit
A. L. U :-arithmetic logic unit
R. A. M :-rendom acess memory
R. O. M :-read only memory
6..primary memory -:RAM, ROM
7..secondary memory:-hard disk, compact disk
8.. 3500-abacus addingmachine -:1623-1662
1833- panchcard
9..INPUT:- input device is a enter data or instructions in to a computer is called input. example :-keyboard, mouse, scanner, barcode, jaystic, digital camera
10...OUTPUT :-the output unit is a device where the result of the program are obtained. example :-monitor, printer, speaker, projector
11. COMPUTER
hardware software
1..process 1..application software
2..output 2..system software
12..
12..Function of computer there was a 4 types
devieded by function
1..accept data
2..process data
3..produces output
4..storage result
13..PROGRAM:-program is a set of instruction
Written in a language understood by the
computer to perform a specific text a set
of program and documents are collectively
called program.
14.. A to Z , 0 to 9, fi to f2 speciall key
15..general key -:101
Multiple :-107
15..there are devieded in to the key 5types
1..function keypad
2..alphanumeric key pad
3..numeric keypad
4..arrow key pad
5..special key pad
16..SCROLL :-stop the scrolling screen
17..INSERT:-mainly use to switch between over
type moden which the cursor over writ any text
that is present on and atter its current location
Copy-:control print
Print-:control
17..PAGEUP:- movis the previous page of the
document.
18..PAGDOWN:-moves to the currentpage of the
document.
19 ..DELETE:-the text or picture delete the letter right to the current cursor posstion
20..HOME KEY:-brings the cursor the first posstion of line.
21..ENDKEY:- brings the cursor to the last posstion of line.
22..Back space :-delete the letter left to the currect cursor posstion.
23..TAB:-advances the cursor to the next tab stop.
24..shift key:-holding the shift key and than prossing a letter creates an upper case letter if the copes lock is an then the effect is reserved.
25.. Father of computer :-charles Babbage date birth -:26. December. 1791.
26..completed a machine is arithmetical engine
Upload-: Upload and download
1.sendig the information from computer and another nones upload .
Download-:accessing information in one system for other system is know a download .
2..the reseving of file copyed from a. remound network location .
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