Your question is Debug a Complex Production Issue. 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).
Describe a situation where you had to debug a complex issue in a production environment.
Use a real example involving security, infrastructure, networking, operating systems, or application reliability. Explain the symptoms, scope, hypotheses, evidence sources, containment decisions, root cause, remediation, and how you verified recovery. Be prepared to distinguish facts from assumptions and describe what you would improve in the investigation process.
