How would you answer an interview scenario involving distributed tracing and correlation IDs?

In an interview, I would first define distributed tracing and correlation IDs and the problem it solves, then explain how I would propagate standard trace context across HTTP and messaging, include trace identifiers in structured logs, sample deliberately, avoid sensitive data in spans, and preserve context across asynchronous boundaries. I would also call out the main failure mode: generating a new unrelated identifier in every service breaks the end-to-end chain and makes troubleshooting distributed failures much harder. Finally, I would describe how I would test, monitor, and safely roll back or recover the solution.