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MHT CET202521 Apr 2025Morning ShiftPhysicsSemiconductorsActual

Which of the following logic gates is called as Universal gate?

Options

  1. AOR
  2. BX-OR
  3. CAND
  4. DNAND

Correct answer

D. NAND

Step-by-step solution

A universal gate implements any Boolean function using only that gate type. The NAND gate and NOR gate are the two universal gates, while OR, XOR, and AND gates are not universal. Any logic gate can be constructed using only NAND gates: NOT is formed by connecting both NAND inputs together, AND by inverting a NAND output with another NAND, and OR through De Morgan's theorem A + B = (A' B')' with three NAND gates. The correct answer is D .

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