CV0-004 Deployment Practice Question
A company wants to deploy a containerized application to a Kubernetes cluster using a rolling update strategy. They have defined a Kubernetes Deployment manifest. Which field controls the number of pods that can be unavailable during the update?
⚠ Common exam trap
In CompTIA Cloud+ exams, candidates often confuse `maxSurge` and `maxUnavailable`. While `maxSurge` controls the number of extra Pods created above the target, `maxUnavailable` specifically governs how many Pods can be taken down during a rolling update.
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` field in a Kubernetes Deployment manifest explicitly controls the maximum number of Pods that can be unavailable during a rolling update. This field can be set as an absolute number or a percentage of the desired Pod count, ensuring that the update proceeds without dropping below a specified availability threshold.
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.strategy.rollingUpdate.maxSurge
Why it's wrong here
maxSurge controls how many extra pods can be created above the desired count.
- ✗
spec.template.spec.containers[].readinessProbe
Why it's wrong here
Readiness probes check pod readiness, but do not control the number of unavailable pods.
- ✓
spec.strategy.rollingUpdate.maxUnavailable
Why this is correct
maxUnavailable defines how many pods can be unavailable during the rolling update.
- ✗
spec.replicas
Why it's wrong here
Replicas sets the desired number of pods, not the update availability.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CV0-004 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CV0-004 exam.