In binary, what does the digit 1 represent?

• A. A high signal
• B. A low signal
• C. A neutral signal
• D. A floating signal

Answer: (A)

Binary uses two distinct electrical states to encode data. The digit 1 corresponds to a high signal—an electrical level that is considered on or true. This is the state that indicates presence or activation in digital circuits and logic gates. By contrast, the digit 0 represents a low signal, the absence of voltage or activation. A floating or neutral signal isn’t a valid binary value because it doesn’t have a defined level and can drift unpredictably. So the digit 1 is the high signal.