Half AdderMediumQuestion 20253
Question
A half adder circuit produces:
- ASum and carry for three bits
- BSum (A XOR B) and carry (A AND B) for two bitsCorrect
- CDifference of two bits
- DOnly the carry bit
Correct answer
Sum (A XOR B) and carry (A AND B) for two bits
Explanation
Half adder: Sum = A ⊕ B (XOR), Carry = A·B (AND). Cannot handle carry input from previous stage → used only for the least significant bit. Full adder adds a carry-in bit.