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In the given figure, A = B = 1 and C = D = 0. Then Y =

/ Digital Electronics, Electronics And Communication Engineering / By
Question: In the given figure, A = B = 1 and C = D = 0. Then Y =
[A].

1

[B].

0 

[C].

either 1 or 0

[D].

indeterminate

Answer: Option B

Explanation:

The CD inputs when fed to NOR gate give output 1. Therefore Y = 1.1.1 = 0.