CV0-004 Deployment Practice Question
A team is using Kubernetes for container orchestration. They want to ensure that a new deployment does not cause downtime by gradually updating pods with a rolling update strategy. Which parameter in a Deployment manifest controls the number of pods that can be unavailable during the update?
⚠ Common exam trap
A common mix-up: candidates confuse `maxSurge` (which controls extra pods created above the desired count) with `maxUnavailable` (which controls pods that can be taken down), leading them to select option C instead of D.
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
✓
spec.strategy.rollingUpdate.maxUnavailable
The `spec.strategy.rollingUpdate.maxUnavailable` parameter in a Kubernetes Deployment manifest specifies the maximum number of pods that can be unavailable during a rolling update. This ensures that a controlled number of pods are taken down at a time, preventing downtime by maintaining a minimum number of available pods throughout the update process.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
spec.minReadySeconds
Why it's wrong here
minReadySeconds delays pod readiness checks, but does not control unavailability count.
- ✗
spec.replicas
Why it's wrong here
Replicas defines the desired number of pods, not the update behavior.
- ✗
spec.strategy.rollingUpdate.maxSurge
Why it's wrong here
maxSurge defines how many extra pods can be created above the desired count.
- ✓
spec.strategy.rollingUpdate.maxUnavailable
Why this is correct
Correct. This parameter controls the maximum number of pods that can be unavailable during the update.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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