Identify the equivalent logic gate represented by the given circuit.

When all inputs of a $NAND$ gate are connected together,the resulting circuit is a .......

What is the output $Y$ in the following circuit, when all the three inputs $A, B, C$ are first '$0$' and then '$1$'?

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

Which one of the following is the Boolean expression for $NOR$ gate?

Identify the logic gate represented by the given circuit and match the values of $A, B, Y$ in the bracket to verify.