Your question is Mentoring Through a Technical Bottleneck. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Tell me about a time you mentored a team through a difficult technical bottleneck. What was blocking progress, how did you coach the team rather than just solve it yourself, and what outcome did you drive?