Which of the following statement is true?
2020
Which of the following statement is true?
- A.
Any logic expression can be implemented using only NAND gates
- B.
Any logic expression can be implemented using only EXNOR gates
- C.
Any logic expression can be implemented using only NOT gates
- D.
Any logic expression can be implemented using only XOR gates
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Correct answer: A
The correct option is A. NAND gates (along with NOR gates) are functionally complete, universal logic gates. This means any fundamental boolean operation (AND, OR, NOT) and consequently any complex logic expression can be implemented entirely using only NAND gates.