Question

A proper combination of $3$ NOT and $1$ AND gates is shown. If $A=0$, $B=1$, $C=1$ then the output of this combination is

• A. $1$
• B. Zero
• C. Not predictable
• D. None of these

Answer 1

The correct option is B Zero

A NOT gate gives an output as opposite to that of its input. An AND gate gives output as 1 only when all of its input signals are 0, else it gives an output as 0.

Thus truth table for the above circuit is shown which suggests that its output (i.e. Y) is zero.

INPUTS			OUTPUTS
A	B	C	D	E	F	Y
0	1	1	1	0	0	0