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Home ‣ Digital Electronics ‣ Combinational Logic Circuits Comments
  • Question

  • The device shown here is most likely a ________.

    The device shown here is most likely a ________. comparator multiplexer demultiplexer parity generat


  • Options
  • A. comparator
  • B. multiplexer
  • C. demultiplexer
  • D. parity generator

  • Correct Answer
  • multiplexer 

    • Combinational Logic Circuits problems

    Search Results

    • 1. Based on the indications of probe A in the figure given below, what is wrong, if anything, with the circuit?


    • Options
    • A. The logic probe is unable to determine the state of the circuit at that point and is blinking to alert the technician to the problem.
    • B. The output appears to be shorted to Vcc, but is being pulsed by the pulser.
    • C. The output appears to be LOW, but is being pulsed by the pulser.
    • D. Nothing appears to be wrong at that point.
      • Discuss
    • 2. Which of the following logic expressions represents the logic diagram shown?


    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 3. Which of the K-maps given below represents the expression X = AC + BC + B?


    • Options
    • A. a
    • B. b
    • C. c
    • D. d
      • Discuss
    • 4. For a two-input XNOR gate, with the input waveforms as shown below, which output waveform is correct?


    • Options
    • A. a
    • B. b
    • C. c
    • D. d
      • Discuss
    • 5. The simplest equation which implements the K-map shown below is:


    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 6. How many 3-line-to-8-line decoders are required for a 1-of-32 decoder?

    • Options
    • A. 1
    • B. 2
    • C. 4
    • D. 8
      • Discuss
    • 7. Which of the following expressions is in the product-of-sums form?

    • Options
    • A. (A + B)(C + D)
    • B. (AB)(CD)
    • C. AB(CD)
    • D. AB + CD
      • Discuss
    • 8. A 74HC147 priority encoder has ten active-LOW inputs and four active-LOW outputs. What would be the state of the four outputs if inputs 4 and 5 are LOW and all other inputs are HIGH?

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 9. A decoder can be used as a demultiplexer by ________.

    • Options
    • A. tying all enable pins LOW
    • B. tying all data-select lines LOW
    • C. tying all data-select lines HIGH
    • D. using the input lines for data selection and an enable line for data input
      • Discuss
    • 10. Which of the following combinations of logic gates can decode binary 1101?

    • Options
    • A. One 4-input AND gate
    • B. One 4-input AND gate, one OR gate
    • C. One 4-input NAND gate, one inverter
    • D. One 4-input AND gate, one inverter
      • Discuss

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