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Question:

The logic circuit shown below has the input waveforms 'A' and 'B' as shown. Pick out the correct output waveform.

Solution:

From the figure we can see the logic gate table of NOT and NOR gate

A
NOT gate(X)
1
0
0
1
0
1
1
0

B
NOT gate(Y)
1
0
0
1
1
0
0
1

X
Y
NOR gate
0
0
1
1
1
0
1
0
0
0
1
0
0
1
1
0