Final answer:
A full bit adder has three inputs: two significant bits and one carry-in bit, and it produces two outputs: the sum and the carry-out bit.
Step-by-step explanation:
A full bit adder, also known as a full adder, is a digital circuit that performs addition of bits. Specifically, it takes three binary inputs and produces two binary outputs. The three inputs consist of two significant bits, which are to be added together, and an additional carry input bit from any previous addition. The two outputs consist of a sum bit and a carry output bit.
The full adder can be contrasted with a half adder, which only takes two inputs and also produces two outputs, but does not account for a carry input from a previous addition, making it less versatile for calculations in multi-bit binary addition.
So, to answer your question: a full bit adder has three inputs (A, B, and Carry-in) and two outputs (Sum and Carry-out).