Which of the following logic gates is called a Universal gate?

Two car garages have a common gate which needs to open automatically when a car enters either of the garages or cars enter both. Devise a circuit that resembles this situation using diodes.

Draw the output signals $C_1$ and $C_2$ for the given combination of logic gates. (Up to $5 \ s$)

In the following circuit,what are $P$ and $Q$?

The Boolean equation of a logic gate is $Y = \bar{A} \cdot B + A \cdot \bar{B}$. Identify the logic gate and describe its construction using $OR$,$AND$,and $NOT$ gates.

The figure shows a logic circuit with two inputs $A$ and $B$ and the output $C.$ The voltage waveforms across $A, B$ and $C$ are as given. The logic circuit gate is