Final answer:
A half-bit adder circuit has two inputs for the binary digits to be added and two outputs, which are the Sum and the Carry.
Step-by-step explanation:
The half-bit adder circuit is a basic digital electronic component used for the purpose of binary addition. In essence, a half-bit adder is the simplest kind of adder circuit that deals with the addition of binary numbers. A half-bit adder, also simply referred to as a half adder, has a total of two inputs and two outputs. The inputs represent two single binary digits (bits) that are to be added, often labeled as A and B. The outputs consist of the Sum and the Carry. The Sum is the direct addition of the inputs as in regular binary addition, whereas the Carry represents whether a '1' needs to be carried over to the next bit position.
To summarize, when asked how many inputs and how many outputs does a half-bit adder circuit have, it has two inputs for the binary digits and two outputs (Sum and Carry).