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A full adder needs five gates and those are 3 AND gates, 1 OR gate and 1 XOR gate. When a full…
A full adder needs five gates and those are 3 AND gates, 1 OR gate and 1 XOR gate. When a full adder is constructed using 2 half adders, it also requires 5 gates. State the names along with the quantity those gates.
Answer
Answer
Official answer keyWhen a full adder is constructed using 2 half adders, it requires 2 AND gates, 1 OR gate and 2 XOR gates - one AND gate and one XOR gate come from each of the two half adders, plus one extra OR gate is added to combine the two carry outputs into the final carry.
From ISC 2025 Specimen Computer Science Paper 1, question 1(x).