Which of the following logic gates is called universal gate?
2023
Which of the following logic gates is called universal gate?
Answer: C. NAND — A universal gate is one that can implement all basic logic functions (NOT, AND, OR) using only that gate. NAND gate is universal because: NOT function: NAND…
- A.
AND
- B.
OR
- C.
NAND
- D.
More than one of the above
- E.
None of the above
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Correct answer: C
A universal gate is one that can implement all basic logic functions (NOT, AND, OR) using only that gate. NAND gate is universal because: NOT function: NAND with both inputs tied together gives NOT. AND function: NAND followed by NOT (using another NAND) gives AND. OR function: Using De Morgan's law, OR can be implemented using NAND gates. AND and OR gates cannot implement all functions alone, so they are not universal. Therefore, NAND is the universal gate.