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Interview Question
What is chaos engineering, and how would you implement it safely in production?
Key Points to Cover
- Define steady state and hypotheses
- Inject controlled failures (latency, instance kill, network partitions)
- Automate rollback and minimize blast radius
- Integrate chaos tests into CI/CD pipelines
Evaluation Rubric
Defines chaos engineering properly30% weight
Covers types of failures injected30% weight
Explains safeguards and rollback20% weight
Mentions CI/CD integration20% weight
Hints
- 💡Tools: Gremlin, Chaos Mesh, Litmus.
Common Pitfalls to Avoid
- ⚠️Lack of clear steady state definition, making it impossible to validate experiments.
- ⚠️Running experiments without proper blast radius controls, potentially impacting all users.
- ⚠️Absence of automated rollback mechanisms, leading to prolonged outages.
- ⚠️Insufficient monitoring and alerting, missing critical deviations during an experiment.
- ⚠️Treating chaos engineering as a one-off activity rather than an ongoing, iterative process.
Potential Follow-up Questions
- ❓How to decide blast radius?
- ❓What metrics validate resilience?
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