What will be the input of A and B for the Boolean expression $\overline{(A + B)}.\overline{(A.B)} =1$?
Answer & explanation
Correct answer: option 1
The given Boolean expresion can be written as
$Y = \overline{(A + B)}.\overline{(AB)}$
$= (\bar A.\bar B).(\bar A+\bar B) = (\bar A.\bar A).\bar B+\bar A(\bar B.\bar B)$
$=\bar A.\bar B+\bar A.\bar B=\bar A.\bar B$
So, the truth table is
