Payment provider returns 401
Your service's checkout flow suddenly fails. The dashboard shows that calls to a third-party payment provider are all returning HTTP 401 Unauthorized as of about 15 minutes ago. Your own service is up, other endpoints that don't call the provider are fine, and you didn't deploy anything. A teammate mentions the security team was 'rotating some secrets' this morning. How do you confirm and fix this?
What a strong answer looks like
Stop the bleeding first (mitigate), then form hypotheses from real signals. Separate root cause from symptom, communicate status as you go, and close with what prevents a repeat.
0:00 of about 20 min
Which questions mattered is sealed until you submit. Telling you now would just be handing over the edge cases.
Run or narrate your approach, then ask the coach.