Fundamentals Of Digital Electronics2

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Questions and Answers
  • 1. 
    A logic gate is an electronic circuit which
    • A. 

      Makes logic decisions

    • B. 

      Allows electron flow only in one direction

    • C. 

      Works on binary algebra

    • D. 

      Alternates between 0&1 values

  • 2. 
    In negative logic, the logic state 1 corresponds to
    • A. 

      Negative logic

    • B. 

      Zero voltage

    • C. 

      More negative voltage

    • D. 

      Lower voltage level

  • 3. 
    The output of a 2-input OR the gate is 0 only when it’s
    • A. 

      Both inputs are 0

    • B. 

      Either input is 1

    • C. 

      Both inputs are 1

    • D. 

      Either input is 0

  • 4. 
    An AND gate
    • A. 

      Implements logic addition

    • B. 

      Is equivalent to a series switching circuit

    • C. 

      Is an any-or-all gate

    • D. 

      Is equivalent to a parallel switching circuit

  • 5. 
    The only function of a NOT gate is to
    • A. 

      Stop a signal

    • B. 

      Recomplement a signal

    • C. 

      Invert an input signal

    • D. 

      Act as a universal set

  • 6. 
    What will be the decimal equivalent of (111011.10)2  
    • A. 

      48.625

    • B. 

      59.487

    • C. 

      48.487

    • D. 

      59.625

  • 7. 
    The decimal equivalent of sum of two binary numbers is         (1010101)2 and (1001010)2
    • A. 

      300

    • B. 

      200

    • C. 

      326

    • D. 

      226

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