Boolean Algebra

Question 5: OUTPUT OF CIRCUIT

Q5- What is the output of the following circuit?

Ans:  This circuit may look simple to you as one has to just evaluate every NOR gate and get the final output but I say it is even simpler than this. Let’s analyze the truth table of NOR gate:

 And we see that even if only one of the 2 inputs is 1 then we need not find out the other input and we can get the output.

As in the above circuit we have one input as 1 to the last NOR gate so we can say that output of the above circuit is ‘0’ without calculating the outputs of other NOR gates.

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