Which of the following are universal gates that can be used to realise the…

2019

Which of the following are universal gates that can be used to realise the function of any combinational circuit?

  1. A.

    NAND and NOR

  2. B.

    AND and OR

  3. C.

    AND and XOR

  4. D.

    OR and XNOR

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Correct answer: A

NAND and NOR are called universal gates because any logic function can be implemented using only NAND gates or only NOR gates.

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