Question

What are the universal gates why they are called so?

Answer 1

can implement any Boolean function without need to use any other gate type. The NAND and NOR gates are universal gates. In practice, this is advantageous since NAND and NOR gates are economical and easier to fabricate and are the basic gates used in all IC digital logic families.

Nand and Nor gates are called universal gates.They called so as since any logic function can be done with Nand and Nor gates.