Most job interviewers ask at least a few of the most common interview questions. Most ask at least a few of the most often-asked behavioral interview questions. But just about every interviewer has at least one go-to question.

That includes Burger King CEO Daniel Schwartz, who says he likes to ask this question:

"Are you smart, or do you work hard?" 

Why is that his favorite question?

"You want hard workers," he said. "You'd be surprised how many people tell me, 'I don't need to work hard, I'm smart.' Really?

"Humility is important. I like people who are passionate, who have persevered and who are clearly humble and not arrogant. It's okay to be confident, but not arrogant."

Or, like America's Cup-winning skipper Jimmy Spithill says, "Rarely have I seen a situation where doing less than the other guy is a good strategy."

You may not be as educated, as experienced, and as "qualified," but you can always out think, out hustle, and out work everyone else. You can always keep trying to learn. You can always keep trying to develop new skills. 

You can always keep trying to be a better version of you.

But to do that, you have to think you have room to improve. You may be smart... but also know you know you can be a lot smarter.

And you're willing to work hard to get there.

That's true whether you want to work for Schwartz... or whether you want to build a successful company. Effort and persistence are the best competitive advantages -- and oftentimes the only advantages you need.