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    Central Processing Unit

                                                              Arithmetic Logic Unit
                                       Input Devices                                      Output Devices
                                                                 Control Unit

                                                                 Memory Unit

                          2.   Computer is called versatile in nature because it can do variety of operations on same set
                              of data.

                          3.   Disadvantages of computer are:
                              Zero IQ: Computer has no IQ level.
                              No decision making: Computer cannot make any decision by itself.

                              Electricity: Computer needs electricity to work.
                          4.   Students can write any four applications learned in chapter.
                          5.
                                              HARDWARE                                     SOFTWARE

                                    Hardware are the devices used in or          Software are the programs you run on
                                   with your computer                           computer

                                    We can touch                                 We cannot touch
                                    Example: Monitor, CPU                        Example : Tux Paint

                     B.  Fill in the blanks.

                          1.  Teaching, Learning       2.  Fast       3.  Memory        4.  Four       5.  Shut down

                     C.  Match the following:

                          1.  c               2.  e             3.  a           4.  b               5.  d

                     D.  Answer the following in one-word:
                          1.  Keyboard (or any other)           2.  Tux paint (or any other)

                          3.  Central Processing Unit           4.  Monitor (or any other)          5.  Hospital

                     E.  State whether these statements are true or false.
                          1. False            2. False          3. False        4. True             5. True

                                                               Chapter 3

                                                                 Exercise

                     A.  Answer the following questions:
                          1.  This key is used in conjunction with other keys to perform special operations like Ctrl+C
                              to copy, Ctrl+V to paste etc.

                                                                               Appendix-I (Answers)                     97

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