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Practice over 1000+ GATE-level questions from this topic!

Designed to match the latest GATE pattern with topic-wise precision, difficulty tagging, and detailed solutions.

Q#1 Combinational Circuits GATE EC 2025 MCQ +1 mark -0.33 marks

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

If the input  is set to logic '  ', then the circuit functions as _________ with  and  as inputs.

an adder

a subtractor

a multiplier

a binary to Gray code converter

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