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DevOps & Automation · Intermediate

Resilience Testing

Testing how a system tolerates and recovers from failures, load spikes, and degraded dependencies.

Definition

It includes failover tests, load and stress tests, chaos experiments, and disaster recovery drills. Results validate RTO/RPO assumptions and SLOs.

Example

A load test pushes the API to 3x normal peak to confirm autoscaling keeps p99 latency within SLO.

Exam tip

Resilience testing should happen regularly, not just once before launch.

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