DLCC Q.24
0. How many full adders are required to construct an m-bit parallel adder ?
- Option : B
- Explanation : We need an adder for every bit. So we should need m full adders. A full adder adds a carry bit to two inputs and produces an output and a carry. But the most significant bits can use a half adder, which differs from the full adder as in that it has no carry input, so we need m-1 full adders in m bit parallel adder.
