What two types of voltage signals are used by computer inputs and outputs?

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Multiple Choice

What two types of voltage signals are used by computer inputs and outputs?

Two main voltage signal types are digital and analog. Digital signals switch between discrete levels, typically representing binary 0 and 1, which makes them straightforward for computers and digital logic to process and for data transfer between devices. Analog signals vary continuously, carrying a range of voltages that can represent real-valued quantities like sound, temperature, or light intensity. Some hardware uses PWM to approximate an analog voltage by rapid switching, but that’s a technique applied to digital signals, not a separate signal type. Terms like AC vs DC or calling signals “pulses” describe specific aspects or methods, not the fundamental categories used to describe computer I/O.

Two main voltage signal types are digital and analog. Digital signals switch between discrete levels, typically representing binary 0 and 1, which makes them straightforward for computers and digital logic to process and for data transfer between devices. Analog signals vary continuously, carrying a range of voltages that can represent real-valued quantities like sound, temperature, or light intensity. Some hardware uses PWM to approximate an analog voltage by rapid switching, but that’s a technique applied to digital signals, not a separate signal type. Terms like AC vs DC or calling signals “pulses” describe specific aspects or methods, not the fundamental categories used to describe computer I/O.

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