Question

Write down the output at $X$, for the inputs,
$A=0,B=0\text{and}A=1,B=1$.

• A. $1,0$
• B. $0,1$
• C. $1,1$
• D. $0,0$

Answer 1

The correct option is C $1,1$

As per the logic circuit, the output $X$ is given by,
$X=\overline{A.B}+B$

For $A=0,B=0$
$X=\overline{0.0}+0=1+0=1$

For $A=1,B=1$
$X=\overline{1.1}+1=0+1=1$

Hence, $\left(B\right)$ is the correct answer.

Why this question? Application:The question explains the use of two gates, combined.