Question

Boolean Expression for the gate circuit shown in the figure is

• A. $A.1=A$
• B. $A.\overline{A}=0$
• C. $A.A=A$
• D. $A.0=0$

Answer 1

The correct option is B $A.\overline{A}=0$

The input $A$ directly goes into the AND gate and also first passes through NOT gate, giving another input of $\overline{A}$ to the AND gate.

$A.\overline{A}=0$ since atleast one of $A$ and $\overline{A}$ is $0$.