18Software Engineering · Interview Prep · Free
Site Reliability Engineer interview questions — and how to answer them.
These are the questions Site Reliability Engineer candidates are most likely to face, from openers to the hard ones — each with a note on what a strong answer covers. Want more, tuned to your level? Use the free generator below.
What interviewers look for in a Site Reliability Engineer
- Concrete examples of systems you've built, with the trade-offs you weighed
- How you debug — the process, not just the fix
- Collaboration signals: code review, disagreements, mentoring
Likely Site Reliability Engineer interview questions
1. Tell me about your experience with incident response and how you've handled a critical production outage.
Describe specific incident, your role, communication, timeline, and post-incident follow-up (postmortem/blameless culture).
2. What monitoring and observability tools have you used, and how do you decide what to alert on?
Mention specific tools (Prometheus, Datadog, etc.), explain alerting strategy to avoid alert fatigue, and discuss SLO/SLI concepts.
3. Describe your approach to deploying code safely in production. How do you minimize risk?
Cover blue-green deployments, canary releases, feature flags, automated testing, rollback procedures, and infrastructure-as-code practices.
4. How do you approach capacity planning and resource scaling for services?
Discuss metrics-driven decisions, forecasting methods, auto-scaling, cost optimization, and communication with product/engineering teams.
5. Walk me through how you would design a disaster recovery and business continuity plan for a critical service.
Address RTO/RPO definitions, backup strategies, failover mechanisms, testing frequency, and cross-region/zone redundancy.
6. How do you approach debugging and troubleshooting issues in distributed systems?
Explain systematic methodology: logs analysis, tracing, metrics correlation, hypothesis-driven testing, and tools used (ELK, Jaeger, etc.).
7. Describe your experience with infrastructure automation and configuration management. What tools do you prefer and why?
Mention Terraform, Ansible, Kubernetes, etc.; explain idempotency, version control for infrastructure, and drift detection strategies.
8. How do you define and measure SLOs for a service? Give an example of how you've used them operationally.
Explain SLO/SLI/SLA distinctions, error budgets, customer impact focus, and how they drive prioritization decisions.
9. Tell me about a time you had to balance reliability with velocity. How did you handle conflicting priorities?
Show nuanced thinking: discuss risk tolerance, data-driven decisions, stakeholder communication, and finding win-win solutions.
10. How would you approach migrating a monolithic application to microservices from an SRE/reliability perspective?
Address service boundaries, observability requirements, failure mode analysis, gradual rollout strategy, and operational readiness.
11. Describe a complex architectural problem you solved that involved reliability or performance trade-offs. What was your decision-making process?
Showcase technical depth, trade-off analysis with metrics, cost-benefit reasoning, and long-term impact consideration.
12. How do you stay current with SRE best practices and new technologies? Tell me about a significant practice you've recently implemented.
Demonstrate continuous learning, mention concrete improvements (chaos engineering, new observability approaches), and show impact on team/organization.
Want to practice answering live with scored feedback? Try the Mock Interview Coach. Applying too? See a Site Reliability Engineer cover letter example.
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