Which circuit adds two binary numbers?

Which circuit adds two binary numbers?

• A. Full-adder
• B. Half-adder
• C. Adder Circuit
• D. Ripple Adder

Answer: (B)

Adding two binary digits requires producing a sum bit and a carry to pass to the next position. The simplest circuit that does this is the half-adder: it takes two inputs and outputs a sum and a carry, with the sum being the XOR of the inputs and the carry being the AND of the inputs. This directly implements the bitwise addition of two single-bit numbers. A full-adder adds a third input (the carry-in) and is used when adding multi-bit numbers, propagating carries across positions. An adder circuit is a general term for devices that add numbers, and a ripple adder specifically chains multiple full-adders to add multi-bit numbers. So for the basic operation of adding two binary digits, the half-adder is the correct choice.

Adding two binary digits requires producing a sum bit and a carry to pass to the next position. The simplest circuit that does this is the half-adder: it takes two inputs and outputs a sum and a carry, with the sum being the XOR of the inputs and the carry being the AND of the inputs. This directly implements the bitwise addition of two single-bit numbers. A full-adder adds a third input (the carry-in) and is used when adding multi-bit numbers, propagating carries across positions. An adder circuit is a general term for devices that add numbers, and a ripple adder specifically chains multiple full-adders to add multi-bit numbers. So for the basic operation of adding two binary digits, the half-adder is the correct choice.