Your question is Debugging Failed Test Cases. 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).
How do you debug a failed test case in a large-scale system?
Explain how you would triage the failure, distinguish product defects from test or environment issues, coordinate with engineering teams, and protect delivery timelines. Cover the evidence you would collect, how you would reproduce the failure, how you would communicate findings, and how you would prevent recurrence.