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  • Question

  • Which of the figures shown below represents the exclusive-NOR gate?

    Which of the figures shown below represents the exclusive-NOR gate? a b c d


  • Options
  • A. a
  • B. b
  • C. c
  • D. d

  • Correct Answer
  • b 

    • Tags: Bank Exams

    Combinational Logic Circuits problems

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    • 1. Which of the figures in figure (a to d) is equivalent to figure (e)?


    • Options
    • A. a
    • B. b
    • C. c
    • D. d
      • Discuss
    • 2. Which of the following combinations cannot be combined into K-map groups?

    • Options
    • A. Corners in the same row
    • B. Corners in the same column
    • C. Diagonal corners
    • D. Overlapping combinations
      • Discuss
    • 3. The device shown here is most likely a ________.


    • Options
    • A. comparator
    • B. multiplexer
    • C. demultiplexer
    • D. parity generator
      • Discuss
    • 4. Two 4-bit binary numbers (1011 and 1111) are applied to a 4-bit parallel adder. The carry input is 1. What are the values for the sum and carry output?

    • Options
    • A. ∑4∑3∑2∑1 = 0111, Cout = 0
    • B. ∑4∑3∑2∑1 = 1111, Cout = 1
    • C. ∑4∑3∑2∑1 = 1011, Cout = 1
    • D. ∑4∑3∑2∑1 = 1100, Cout = 1
      • Discuss
    • 5. A full-adder has a Cin = 0. What are the sum (∑) and the carry (Cout) when A = 1 and B = 1?

    • Options
    • A. ∑ = 0, Cout = 0
    • B. ∑ = 0, Cout = 1
    • C. ∑ = 1, Cout = 0
    • D. ∑ = 1, Cout = 1
      • Discuss
    • 6. How many outputs would two 8-line-to-3-line encoders, expanded to a 16-line-to-4-line encoder, have?

    • Options
    • A. 3
    • B. 4
    • C. 5
    • D. 6
      • Discuss
    • 7. Looping on a K-map always results in the elimination of:

    • Options
    • A. variables within the loop that appear only in their complemented form.
    • B. variables that remain unchanged within the loop.
    • C. variables within the loop that appear in both complemented and uncomplemented form.
    • D. variables within the loop that appear only in their uncomplemented form.
      • Discuss
    • 8. Which of the following is an important feature of the sum-of-products form of expressions?

    • Options
    • A. All logic circuits are reduced to nothing more than simple AND and OR operations.
    • B. The delay times are greatly reduced over other forms.
    • C. No signal must pass through more than two gates, not including inverters.
    • D. The maximum number of gates that any signal must pass through is reduced by a factor of two.
      • Discuss
    • 9. In VHDL, macrofunctions is/are:

    • Options
    • A. digital circuits.
    • B. analog circuits.
    • C. a set of bit vectors.
    • D. preprogrammed TTL devices.
      • Discuss
    • 10. What type of logic circuit is represented by the figure shown below?


    • Options
    • A. XOR
    • B. XNOR
    • C. XAND
    • D. XNAND
      • Discuss

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