It depends on what is meant by the "best" code. If a company is evaluating a candidate for a team, then the "best" code in this case can do next to nothing and still be the best: clarity, readability, structure, consistency would be the main evaluation points. Another case of the "best" code would be something that has the best value. However if a company is looking for this particular type of code, then they are not actually interested in the code, they are interested if you are awesome.
Thing is, my best code which does something productive looks the same as my code which does something boring. I would send the code for the boring case and a executable binary of the productive case. With a note: this is how my code looks like, and this is what I can do.
THEY ARE NOT GOING TO COMPILE IT ANYWAYS.