engineering recuitment OPSC Assistant Industries Officer Mock Test 2025 Digital Electronics Logic Gates and Boolean Algebra Laws of Boolean Algebra
Which of the following Boolean expression is incorrect?
1
\(\overline{ {\overline A} + \overline{B }}= A\centerdot B\)
2
\(\overline { A +{\overline {\overline B}}} = \overline A\centerdot \overline B\)
3
\(\overline{ {\overline A} \centerdot \overline{B }}= A+B\)
4
\(\overline {\overline A \centerdot {\overline {\overline B}}} = \overline A + B\)