The below truth table corresponds to A B Y 0 0 1 1 0 1 0 1 1 1 1 0

From the given truth table, the output $Y$ is $0$ only when both inputs $A$ and $B$ are $1$. For all other combinations of inputs, the output $Y$ is $1$.

This is the exact complement of an AND gate, where the output is $1$ only when both inputs are $1$.

The Boolean expression for this truth table is $Y = \overline{A \cdot B}$, which corresponds to a NAND gate.

Answer: NAND gate