Question

A half adder has

• A. One input and two outputs
• B. Two inputs and two outputs
• C. Three inputs and one output
• D. Two inputs and one output

Hint:

Half adder → no carry input, Full adder → includes carry input.

Answer 1

The Correct Option is B

Concept: A half adder is a combinational circuit used to add two binary digits.

Step 1: Inputs of half adder.
• Two binary inputs: \(A\) and \(B\)

Step 2: Outputs of half adder.
• Sum = \(A \oplus B\)
• Carry = \(A \cdot B\)

Step 3: Count outputs.
• Total outputs = 2 (Sum and Carry)

Step 4: Conclusion. \[ \boxed{(2)\ \text{Two inputs and two outputs}} \]