Welcome to your interview.
The question is on your right: Mentoring an Underperforming Engineer. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
Tell me about a time you mentored someone on your team who was struggling or had clear growth gaps. How did you diagnose what they needed, support their development, and measure whether your mentorship actually helped?