Official PYQ · 2025Set 1 · Q14Combinatorial CircuitsMCQ1 mark

GATE EC 2025 Set 1 Q14 — Combinatorial Circuits

A full adder and an XOR gate are used to design a digital circuit with inputs $X, Y$ , and $Z$ , and output $F$ , as shown below. The input $Z$ is connected to the carry-in input of the full adder.

If the input $Z$ is set to logic ' $l$ ', then the circuit functions as $\_\_\_\_\_\_\_$ with $X$ and $Y$ as inputs.

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Answer: B

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Published 10 Oct 2026

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