The two combinations of $NAND$ gates shown in the figures are equivalent to:

$A$ $NOR$ gate and a $NAND$ gate are connected as shown in the figure. Two different sets of inputs are given to this setup. In the first case, the inputs to the gates are $A=0, B=0, C=0$. In the second case, the inputs are $A=1, B=0, C=1$. The output $D$ in the first case and second case respectively are

In the digital circuit,the inputs are as shown in the figure. The Boolean expression for output $Y$ is

For the given digital circuit, identify the logic gate it represents:

Given $A$ and $B$ are input terminals. Logic $1 = > 5 \ V$,Logic $0 = < 1 \ V$. Which logic gate operation does the above circuit perform?

Draw the output signal $Y$ for the given combination of logic gates shown in the figure.