Internet Of Things (IOT102) Practice Test

What are the two main types of Arduino pins?

Digital and analog. Digital and modulation. Pulse and analog. Analog and digital.

Correct Answer:

Digital and analog.

Explanation:

Pins on an Arduino are categorized into digital and analog. Digital pins work as on/off channels—you set them HIGH or LOW and use them for simple binary signals like turning an LED on or off or reading a button. Analog pins, on the other hand, read varying voltages through the board’s analog-to-digital converter, letting you measure sensors whose output isn’t just on or off. They typically give a numeric value corresponding to the voltage you feed in (for example, a 10‑bit scale from 0 to 1023 on many boards). Some boards also allow using analog pins as digital pins when extra I/O is needed, but their primary role is to read analog signals.

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