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What is operating  system ?
                                            And computer  can do without operating system?



                                      Basically
                                                     An operating system is system software that provides an
                                   interface for user to interact with the computer . It controls the execution
                                of all types of software or,programs .
                                2nd Ans
                                A computer cannot do  anything without operating system.  operating system
                                must be installed on every computer .
                               An operating system is responsible to allocate system resources.These
                              resources include memory,processor,disk space and peripheral devices
                              such as monitor , printer and modems etc.
                           

Types of operating system ?
                                               There are two types of operating system .
                                              1st
                                        Graphical user interface operating  system.
                                       2nd
                                         command-line operating system.

What is the purpose of  operating system ?
  There are two purpose of operating system.
1st
     
It manage hardware and software resources of computer .The resources include processor
,memory and disk space etc .

2nd
It provides a consistent way for application to interact with the hardware without
knowing all the details of the hardware.

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