Digital Logic And Logic Families-a4

10 Questions | Total Attempts: 52

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Digital Logic And Logic Families-a4 - Quiz

Digital logic and logic families: Digital signals, combinational and sequential logic circuits, clock signals, Boolean algebra and logic gates. Integrated circuits and logic families: Logic Levels, Noise Immunity, Fan Out, Propagation Delay, TTL logic family CMOS Logic family, comparison with TTL family Flip flops: Set Reset(SR),Trigger(T), clocked F/Fs; Registers, decoders and encoders, Multiplexer and Demultiplexer, applications


Questions and Answers
  • 1. 
    Explain : Noise Immunity
  • 2. 
    DeMorgan’s theorem states that
    • A. 

      (AB)’ = A’ + B’

    • B. 

      (A + B)’ = A’ * B

    • C. 

      A’ + B’ = A’B’

    • D. 

      None of the Mentioned

  • 3. 
    Which Configuration of TTL is preferred if FAN OUT is requirement​​​​​​​
    • A. 

      Standard output TTL

    • B. 

      Totem pole

    • C. 

      Open Collector TTL

    • D. 

      Tri state TTL

  • 4. 
    In D flip-flop, D stands for
    • A. 

      Data

    • B. 

      Delay

    • C. 

      Both Delay and Data

    • D. 

      None of the Mentioned

  • 5. 
    Why is a demultiplexer called a data distributor?
    • A. 

      The input will be distributed to one of the outputs

    • B. 

      One of the inputs will be selected for the output

    • C. 

      The output will be distributed to one of the inputs

    • D. 

      None of the Mentioned

  • 6. 
    A universal logic gate is one which can be used to generate any logic function. Which of the following is a universal logic gate? a) OR b) AND c) XOR d) NAND
    • A. 

      OR

    • B. 

      AND

    • C. 

      XOR

    • D. 

      NAND

  • 7. 
    How many truth table entries are necessary for a four-input circuit?
    • A. 

      4

    • B. 

      8

    • C. 

      12

    • D. 

      16

  • 8. 
    All continuous signals are analog in nature but all analog signals can be
    • A. 

      Only continuous

    • B. 

      Continuous or discrete

    • C. 

      Only discrete

    • D. 

      Digital

  • 9. 
    In 1-to-4 demultiplexer, how many select lines are required?
    • A. 

      2

    • B. 

      3

    • C. 

      4

    • D. 

      5

  • 10. 
    How many NAND gates are require to implement OR gate
    • A. 

      2

    • B. 

      3

    • C. 

      1

    • D. 

      4

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