Question

In the digital circuit shown below, the output f is found to be logic 1 when A is logic '0'. The values of B and C are

• A. B = 1, C = 0
• B. B = 0, C = 0 or 1
• C. B = 1, C = 1
• D. Indeterminate

Answer 1

The correct option is B B = 0, C = 0 or 1

For A=0 and f = 1

So for $f=1;f=\overline{B},B=0$ and C could be 0 or 1.