Computer Note

 

 1. which was the first calculating device in the world?

= Abacus was the first calculating device in the world.










2. who invented the computer?

= The computer was invented by Charles Babbage.










3. what is a computer?

= A computer is an electronic machine that takes input, processes the input, and gives us the output.

or

= A computer is a smart machine that accepts the data and instruction as an input, processes the input, gives the result ( output ), and stores it for future use.

4. what is an input?

= Any data and instruction are given to a computer for processing that is called an input.

5. what is processing?

= When a computer works on input that is called processing.

6. which part ( component ) of the computer does processing?

= The processing is done by the CPU ( central processing unit )  part of the computer.

7. what is the output?

= A computer gives results after processing that is called output.

8. what is the basic working principle of all computers?

= IPO ( input, processing, output ) is the basic working principle of all computers.

                                                         or

8. How does a computer work?

= A computer works on three basic steps that are input-processing and output.











9. what are input devices?

= The devices which are used to give input to the computer are called input devices.

examples: Mouse, keyboard, scanner, webcam, joystick, etc.

10. what are processing devices?

= The devices which are used to process the data into meaningful information are called processing devices. The processing is done by the CPU.

11. What are output devices?

= The devices which are used to show the result of processing are called output devices.

examples: monitor, speaker, printer, etc.

12. write the characteristics of a computer.

=The characteristics of a computer are; High speed, versatility, communication, automatic, high storage capacity, diligence, accuracy, etc.


















14. write the application areas of the computer

                                      or  

Name any places ( fields ) where computers are used.












15.  what are the limitations of the computer

                               or

write the disadvantages of the computer.










16. Write the advantages and disadvantages of the computer. 












17. what are the various storage measurement units?











19. what do you mean by GIGO?












20. some full forms:

a. BIT= Binary digit

b. MHz= Megahertz

c. GHz= Gigahertz

d. CPU = central processing unit

e. KB= kilobytes

f. MB = megabytes

g. GB= gigabytes

h. TB= terabytes

i. GIGO = garbage in garbage out

j. VDU = video display unit or visual display unit.



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