21. Which of the following provides up to 12 volts to hard drives, CD-ROM’s, etc.:
    

1. 1. Mini
      

   
   
   

   2. Molex
      

   
   
   

   3. Sub-Mini
      

   
   
   

   4. Melox

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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22. Which version of MS Windows first introduced the concept of networking?
    

1. 1. Windows 1
      

   
   
   

   2. Windows 2
      

   
   
   

   3. Windows 3
      

   
   
   

   4. Windows 3·11

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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23. How many bits is the DOS operating environment?
    

1. 1. 4
      

   
   
   

   2. 8
      

   
   
   

   3. 16
      

   
   
   

   4. 32

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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24. In what year was MS-DOSv1 first introduced?
    

1. 1. 1979
      

   
   
   

   2. 1980
      

   
   
   

   3. 1981
      

   
   
   

   4. 1982

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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25. What is the interface between an OS and Application program called?
    

1. 1. .DLL
      

   
   
   

   2. .SYS
      

   
   
   

   3. API
      

   
   
   

   4. .EXE

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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