In the Boolean algebra,the expression $\left( {\overline {\bar A \cdot \bar B} } \right) \cdot A$ is equal to:

The output of the following circuit is equivalent to which gate?

If $X$ and $Y$ are the inputs,the given circuit works as . . . . . . .

The output $Y$ for the given inputs $A$ and $B$ to the circuit is:

Refer to the logic circuit given below. For two inputs $(A=1, B=1)$ and $(A=0, B=1)$,the output $(Y)$ will be . . . . . . .

The following figure $(i)$ shows a logic gate circuit with two inputs $A$ and $B$ and output $C$. The voltage waveforms of $A, B$,and $C$ are as shown in the figure $(ii)$ given below. The logic circuit gate is: