21. What are the units used to count the speed of a printer ?

1. 1. CPM

   
   
   

   2. DPI

   
   
   

   3. PPM

   
   
   

   4. BIT

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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22. First computer mouse was built by

1. 1. Douglas Engelbart

   
   
   

   2. William English

   
   
   

   3. Oaniel Coogher

   
   
   

   4. Robert Zawaxki

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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23. A hard copy would prepared on a

1. 1. line printer

   
   
   

   2. dot matrix printer

   
   
   

   3. plotter

   
   
   

   4. type writer terminal

   
   
   

   5. All of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: E

   NA

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24. CRT is a

1. 1. hollow tube

   
   
   

   2. vacuum tube

   
   
   

   3. long tube

   
   
   

   4. round tube

   
   
   

   5. None of the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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25. The OCR is used for the preparation of

1. 1. electricity bills

   
   
   

   2. insurance premium

   
   
   

   3. telephone bills

   
   
   

   4. All of the above

   
   
   

   5. None of the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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