Tell me about a major production incident you helped handle.
- Technology:
- Behavioral
- Experience:
- Senior
Quick answer
Cover detection, communication, mitigation, investigation, recovery and the changes made afterwards to reduce recurrence.
What the interviewer is evaluating
- Incident judgment
- Leadership under pressure
- Communication
- Reliability mindset
How to structure your answer (STAR)
- Situation: incident and impact.
- Task: your responsibility.
- Action: mitigation, coordination and investigation.
- Result: recovery and prevention.
Example answer
A deployment caused elevated error rates for a critical API during business hours.
I helped pause the rollout, compared the affected metrics with the previous version and coordinated the rollback while another engineer checked recent configuration changes. Once service recovered, we reproduced the issue and identified an unsafe assumption in validation logic.
We added regression tests, safer rollout checks and an alert for the specific failure pattern. The main lesson was to make rollback and observability part of the release design.
Discussion
Incident questions test calm decision-making and ownership under pressure.
Separate immediate mitigation from root-cause analysis. During an incident, restoring service is usually more important than finding the perfect explanation immediately.
For senior candidates, include how you coordinated people, communicated status and improved the system after the incident.
Key points
- Protect users first
- Communicate clearly
- Investigate systematically
- Prevent recurrence
Common mistakes
- Trying to be the hero.
- Skipping communication.
- Focusing only on the technical root cause.
- Blaming the person who made the change.
Follow-up questions
- How did you communicate during the incident?
- What changed afterwards?