Let's start by not deluding ourselves. Hiring anyone is a risk. Google is famous for the intense and lengthy scrutiny they put their candidates under. The Google interview might be intense, but when they decide to hire, they're rolling the dice.
You're not going to know who you hired for months.
This doesn't mean you can't improve your odds.
For me, success in an interview is extracting as much information as possible from the candidate. This doesn't happen because you've got a compelling set of interview questions; it comes from throwing a wildly different set of interviewers at your candidate. What these people find, through their diversity of perspective, is the best information you can have to make a hiring decision. ...