Per-region quota limit exceeded
Your app uses a cloud vendor API that enforces a SEPARATE quota per region. At 14:00 a feature degrades for users in one region (eu-west) — calls there error at ~60% with 429 'quota exceeded' — while the same feature works perfectly for US and APAC users. Dashboards: your GLOBAL call volume to the vendor is well under your overall quota, but the eu-west regional endpoint is pinned at its per-region cap; eu-west traffic grew after a product launch there last week. No code change today. How do you triage and mitigate?
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 30 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.