Question

What is the use of the RESET button on the Arduino UNO?

(a) To restart the code present in the Arduino

(b) To restore a previous version of a code

(c) To erase the code present in the Arduino

(d) To erase the SRAM in Arduino Microcontroller

I had been asked this question in unit test.

The query is from Board Pinout Structure in division Board Specifications and Types of Arduino

Answer 1

Right choice is (a) To restart the code present in the Arduino

To explain: The external RESET button on then Arduino is used for restarting the Arduino’s bootloader, effectively stopping the execution of the code that was already present on the Arduino and then rerunning it after a few seconds of delay by which point the bootloader is ready. This should be always performed with all external connections to the GPIO pins of the Arduino taken out.