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Let's Revisit


                       a computer works in three steps: Input   Process   Output. This is also

                       called IPO cycle.
                       The devices that are used to enter data into the computer are known as

                       input devices. The most commonly used input devices are keyboard and

                       mouse.

                       The device that works on the input is called the processing device. cPu                             WOrkIng Of a cOMPuTer
                       is the main processing device.

                       The devices that help us to get the results are called output devices. The

                       most commonly used output devices are monitor, printer, headphones and

                       speakers.
                                                                                                                          31




                                                    Mind Drill







                    Rapid Fire


                 1. Tick ( ) the correct option.
                             
                     a.  Which of the following is the brain of the computer?




                         i.                                ii.                                 iii.



                     b. Which of the following is not an output device?




                         i.                                ii.                                 iii.



                     c.  Which of the following is not an input device?





                         i.                                ii.                                 iii.
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