CV0-004 Deployment Practice Question
A DevOps team is implementing a CI/CD pipeline to deploy a microservices application on Kubernetes. The team wants to ensure that the deployment automatically rolls back if the new version fails health checks after the update. Which Kubernetes feature should be configured in the deployment manifest?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A readiness probe with a low failure threshold
A readiness probe determines if a pod is ready to serve traffic. If it fails, the rolling update pauses or rolls back depending on the deployment strategy's progressDeadlineSeconds and revisionHistoryLimit.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
A readiness probe with a low failure threshold
Why this is correct
Readiness probes control whether a pod is considered ready; failures can trigger rollback.
- ✗
A startup probe with a long initial delay
Why it's wrong here
Startup probes are for slow-starting containers, not for rollback.
- ✗
A ConfigMap for health check endpoints
Why it's wrong here
ConfigMap provides configuration, not health checking.
- ✗
A liveness probe with a high failure threshold
Why it's wrong here
Liveness probes restart containers, not roll back deployments.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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