Your question is Error Code Tagging. 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).
Explain how you design and implement error code tagging.
Cover how you would define a consistent taxonomy, assign codes across services, expose them through APIs, document their meaning, and prevent breaking changes. Explain how you would coordinate implementation, testing, rollout, and monitoring with the relevant engineering and product stakeholders.
