What is Chaos Engineering, and why practice it?
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Quick Answer
Chaos Engineering deliberately injects failures into systems to proactively discover weaknesses and prove resilience before real incidents do. You practice it to build confidence that redundancy, failover, and alerting actually work.
Detailed Answer
It is experiment-driven: define steady state, hypothesize the system tolerates a fault, inject it within a controlled blast radius (often in production), and measure. Findings drive fixes to redundancy, timeouts, and runbooks. Tools include Chaos Mesh, Gremlin, and LitmusChaos. It complements testing by validating behavior under real-world turbulence.
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Interview Tip
Emphasize proactive, hypothesis-driven, controlled blast radius — and that the goal is confidence, not breakage.
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