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                              Q:
                           
                           
                                                      | A) no need of power supply | B) large storage capacity | 
| C) Both A & B | D) None of the above | 
                              Answer:   C) Both A & B
                              
                                                            
                              
Explanation:
                               
                           
                           Explanation:
Secondary storage therefore needed because it is non-volatile, meaning it retains its contents without the need for a power supply. It also has the large storage capacity needed to store the operating system and all the programs and files needed by a modern computer system.

 
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