Question

Boolean expression for the gate circuit shown below is

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

Answer 1

The correct option is A $A+\overline{A}=1$

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

$A+\overline{A}=1$ since atleast one of $A$ and $\overline{A}$ is $1$.