Same chapter3 marksDifficulty: Medium
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3 marksDifficulty: Medium
Draw the truth table of a full adder and state how many half adders it takes to build one.
Original Khojo Papers practice question — not from a past board paper.
Answer
For inputs A, B and Cin, the sum is A ⊕ B ⊕ Cin and the carry out is AB + Cin(A ⊕ B). A full adder is built from two half adders and one OR gate.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Cascading full adders gives a ripple-carry adder for multi-bit numbers.
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