What type of logic circuit is represented by the figure shown below?
2006
What type of logic circuit is represented by the figure shown below?

- A.
XOR
- B.
XNOR
- C.
XAND
- D.
XNAND
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Correct answer: B
First, analyze the top path where inputs A and B pass through inverters before entering an AND gate. This produces the term A'B'.
Next, observe the bottom path where inputs A and B enter an AND gate directly. This produces the term AB.
Finally, the outputs of these two paths are combined by an OR gate to yield X = AB + A'B'.
This Boolean expression represents the XNOR (Exclusive-NOR) logic function.
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