Which tool would you use to view real-time data sent from the microcontroller over USB?

• A. Serial Monitor
• B. Text Console
• C. Sketch Editor
• D. Line Number

Answer: (A)

Viewing real-time data from a microcontroller over USB happens through the serial interface. The microcontroller writes data to its serial port, and the USB bridge presents that as a virtual serial port on your computer. The Serial Monitor connects to that port at the chosen baud rate and displays the incoming data as it arrives, so you can see numbers, messages, and logs in real time. It’s the natural tool for observing live output and can also handle simple input back to the board. The other options don’t fit this purpose: a text console isn’t the standard way to view the device’s serial output, the sketch editor is for writing code, and line numbers are just navigation in the editor.