Your question is Solving a Difficult Problem. 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 difficult problem you solved.
Choose a specific professional example rather than describing your general approach. Explain the context, why the problem was difficult, your responsibilities, the actions you took, the people or constraints involved, and the result. Focus on how you diagnosed the problem, made trade-offs, handled uncertainty, and took ownership through resolution. Be prepared to discuss what you would do differently and what you learned.