Q. Which logic name or gates are known as universal logic?

Ans. NAND logic and NOR logic gates are universal logic. It is possible to implement any logic expression by NAND and NOR gates. This is because NAND and NOR gates can be used to perform each of Boolean operations INVERT, AND and OR. NAND is same as AND gate symbol except that it has a small circle at output. This a small circle represents the universal operations.