Your question is Diving Deep on a Failure. 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).
Walk me through a time you had to dive deep into a complex system failure to find the root cause. What was your methodology, how did you separate signal from noise, and what changed afterward because of what you found?