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BCECE Engineering BCECE Engineering Solved Paper-2012

  • question_answer
    Which logic gate is represented by the following combination of logic gates?

    A)  OR                        

    B)         NAND

    C)  XOR                     

    D)         None of these

    Correct Answer: A

    Solution :

    The truth table can be written as
    Inputs Output
    \[{{A}_{1}}\] \[{{B}_{1}}\] \[{{\bar{A}}_{1}}\] \[{{\bar{B}}_{1}}\] Y
    0 0 1 1 0
    0 1 1 0 1
    1 0 0 1 1
    1 1 0 0 1
    The output Y is that of OR gate.


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