Worst interview in my life. I’m quoting myself here; this a draft mail I’ve written to the contact HR person, but never sent it.

“I was thinking, since a little bit, about the things happening around big tech companies, and I thought I might write a small feedback letter: this might cut my chances to work ever again for Apple, but seeing, overall, the way companies handle candidates made me think I should write these down. If you don't give feedback, I'll give one.

Running late from a first impression interview is OK, but joining an interview and later leaving is the most terrible thing you can do; as this is the window you have towards the outside world, and this is an opportunity to give the best of yourself to people who would want to join Apple and "Make a difference."

I'm coming from banking side; most of my experience is gained from banks, and we always had meetings and trainings about how to behave accordingly during interviews with outside candidates-clients, people who are not part of an organization, as that needs a lot more effort to put in, as they are the ones who see us in a complete different way.

I know my response during the interview might not meet your requirements, but I also had no chance to show real knowledge, as the interviewer (the person who should represent a whole company) showed no real interest towards me (being late 15 minutes and later another 10 minutes).

This is like a relationship; both parties should at least show some sort of interest in each other (or at least honor), especially companies and tech recruiters who have the power to choose whom they reach out to and invite for a first round get-to-know call.

From my perspective, I was looking forward to having a first interview with Apple, as I love the products since I was a little kid, and this first impression basically ruined my whole picture about the company.

This email might be irrelevant from your perspective, as you'll find definitely a candidate who's tolerance and acceptance level is higher, but I think such a view and such a mindset should not be a value for a company who's background is defined by the perfection of their products, the culture, and PR.

As you can see, the world is changing, and the odds are clearly in your favor, but the trends are showing this might going to change dramatically, and finding the perfect candidate versus the right candidate might not be the same.”

Describe how would you test if a traffic light is working.