Logic Gates — Prelims Questions

Which of the following logic gates produces an output '1' only when all its inputs are '1'?

The output of a two-input NOR gate is '1' if:

Which of the following gates is considered a universal gate?

Using De Morgan's theorem, the expression $\overline{A + \bar{B}}$ is equivalent to:

What is the output Y of the following circuit for inputs A=1, B=0, C=1?

Which combination of gates can be used to realize an XOR gate?