On-callMediumoc-p089

Subject CapacityLevel Senior–Staff~20 minCommon in Reliability & on-call interviewsIndustries Technology

Question

Leadership wants confidence the system survives losing a region. As on-call/SRE, how do you plan and run a regional-failover test (game day) safely?

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.

Learn the concepts

Diagram & narrate the incident

Loading whiteboard…

Run or narrate your approach, then ask the coach.