- A
spec.strategy.rollingUpdate.maxSurge
Why wrong: maxSurge controls how many extra pods can be created above the desired count.
- B
spec.template.spec.containers[].readinessProbe
Why wrong: Readiness probes check pod readiness, but do not control the number of unavailable pods.
- C
spec.strategy.rollingUpdate.maxUnavailable
maxUnavailable defines how many pods can be unavailable during the rolling update.
- D
spec.replicas
Why wrong: Replicas sets the desired number of pods, not the update availability.
Question 783 of 997
CV0-004 Deployment Practice Question
This CV0-004 practice question tests your understanding of deployment. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company wants to deploy a containerized application to Google Kubernetes Engine (GKE) 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?
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
Option C is correct because 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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
spec.replicas
Why it's wrong here
Replicas sets the desired number of pods, not the update availability.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the confusion between `maxSurge` and `maxUnavailable`, where candidates mistakenly think `maxSurge` controls unavailability, but in reality `maxSurge` governs the number of extra Pods created above the target, not the number of Pods that can be taken down.
Detailed technical explanation
How to think about this question
The `maxUnavailable` field works in conjunction with `maxSurge` to orchestrate a rolling update: while `maxUnavailable` limits how many Pods can be down at any time (default 25%), `maxSurge` caps how many extra Pods can be created above the desired count. Under the hood, the Kubernetes controller calculates the effective surge and unavailable counts based on the desired replicas, then incrementally scales up new ReplicaSets and scales down old ones to maintain the specified availability guarantees, which is critical for zero-downtime deployments in production.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the CV0-004 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this CV0-004 question test?
Deployment — This question tests Deployment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: spec.strategy.rollingUpdate.maxUnavailable — Option C is correct because 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.
What should I do if I get this CV0-004 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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.
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