DigitalSystem Design Viva Questions

DigitalSystem Design Viva Questions
1)What are weighted and non weighted codes?
2)What is XS-3 Code?
3)What is Mux and DE-Mux?
4)What are different Types of gates we have?
5)Why Nand gate is called Universal gate?
6)Explain how you create 16:1 Mux using 4:1 Mux?
7)Basic System used in cell phone explain?
8)What is grey code used to make K-Maps?
9)Which is the best Minimization technique? Explain?
10)Explain about the experiment in detail to me?