At a former job we ended technical interviews with the question: "So, how do you think you did?". It allowed candidates to raise points and what they'd want to

At a former job we ended technical interviews with the question: "So, how do you think you did?". It allowed candidates to raise points and what they'd want to do different. Some candidates used the chance to ask for feedback at which point I could choose to agree with the candidate or elaborate on solutions. It avoids some of the defensive stances candidates may take when given feedback (because they go first) although it doesn't tell a candidate how they did badly if they weren't already slightly aware.