Your question is Monitor and Debug Bottlenecks. 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 monitor and debug performance bottlenecks in a production backend environment?
Describe the observability signals, tools, and diagnostic workflow you would use. Explain how you would distinguish application, database, infrastructure, and dependency-related bottlenecks while minimizing production risk. Include how you would validate the fix and prevent recurrence.