Which of the following logic gates is classified as a universal gate because any Boolean logic function (AND, OR, NOT) can be constructed exclusively using it?
Answer and explanation
Correct answer: C. NAND gate
- Step 1: A universal logic gate is one that can implement all basic Boolean logic operations without needing any other gate type.
- Step 2: Both NAND and NOR gates are universal gates.
- Step 3: For example, connecting both inputs of a NAND gate together yields a NOT gate; feeding outputs into a NAND gate yields AND and OR functions by De Morgan's laws.
Answer
NAND gate.
Why not the others: AND gate cannot perform inversion (NOT); OR gate cannot perform inversion (NOT); XOR gate cannot generate basic AND/OR functions alone without an inverter.
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