Question

What is the resolution of the micros() function on the Arduino Nano?

(a) 2 Microseconds

(b) 3 Microseconds

(c) 4 Microseconds

(d) 5 Microseconds

I had been asked this question by my college director while I was bunking the class.

This is a very interesting question from Time Functions topic in section Arduino Programming of Arduino

Answer 1

Right answer is (c) 4 Microseconds

Easiest explanation: The micros() function gives the up-time of the Arduino program in microseconds. This function has a resolution, i.e. the intervals in which it gives an output. This resolution depends on the Frequency of the specific Arduino Board that its running on. On the Arduino Duemilanove it’s resolution is 4 Microseconds.