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Input Output interfacing MCQs

  • 1.  How many types of Interfacing?
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    Answer is : A
  • 2. In which type of communication, the interface gets a single byte of data from the microprocessor and sends it bit by bit to the other system serially and vice-a-versa?
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    Answer is : B
  • 3. Which of the following are known as Higher Address Bus?
  • filter_dramaExplanation
    Answer is : A
  • 4.  In which mode, the CPU periodically reads an internal flag of 8279 to check whether any key is pressed or not with key pressure?
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    Answer is : B
  • 5.  What is true about Encoded Mode?
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    Answer is : D
  • 6.  Which pin is used to blank the display during digit switching?
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    Answer is : C
  • 7. Which mode allows 8/16 character multiplexed displays to be organized as dual 4-bit/single 8-bit display units?
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    Answer is : B
  • 8. DMA stands for?
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    Answer is : D
  • 9. Which of the following is not true features of 8257?
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    Answer is : A
  • 10. What is correct range of frequency for 8257?
  • filter_dramaExplanation
    Answer is : C
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