As a candidate, I’ve had some interesting (and some stupid) questions come my way. Like: If you were an animal, what animal would you be? How would you work out how many glass windows there are in the city? What is the volume of water that flows through a cylinder with a radius of x, and the water is y high (asked, oddly, of someone interviewing to manage software engineers, not pipes). What these have in common isn’t just that they are stupid questions, it’s that they are one-directional. The candidate performs, the interviewer judges, and that judgment never makes it back to the candidate. To be fair, I’ve probably asked my share of bad questions as an interviewer. But over time (and I’ve probably interviewed more than a thousand people), I’ve settled on this as my favourite and most valuable question to ask at the end of an interview: “I’d like to give you some feedback. First, so you can get some feedback on the interview, but also so you have the chance to correct anything that I have misinterpreted.…