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 DevOps team sets up a CI/CD pipeline for a containerized application on Kubernetes. They want to test a new version with a small subset of users before full rollout. Which deployment method should they use?
Canary
Canary sends a small percentage of traffic to the new version for testing.
Recreate
Why wrong: Recreate kills all existing pods before starting new ones, causing downtime.
Rolling update
Why wrong: Rolling update replaces pods incrementally but doesn't provide a canary subset.
Blue/green
Why wrong: Blue/green maintains two environments and switches traffic all at once.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Canary
A canary deployment releases the new version to a small subset of users (e.g., 5-10% of traffic) while the rest continue using the stable version. This allows the team to monitor performance, errors, and user feedback before gradually increasing the rollout. Kubernetes supports canary deployments natively through techniques like multiple Deployments with shared labels and service mesh traffic splitting (e.g., Istio or Linkerd).
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Canary
Why this is correct
Canary sends a small percentage of traffic to the new version for testing.
Related concept
Read the scenario before looking for a memorised answer.
Recreate
Why it's wrong here
Recreate kills all existing pods before starting new ones, causing downtime.
Rolling update
Why it's wrong here
Rolling update replaces pods incrementally but doesn't provide a canary subset.
Blue/green
Why it's wrong here
Blue/green maintains two environments and switches traffic all at once.
Common exam traps
CompTIA often tests the distinction between canary and rolling update by implying that rolling updates can also target a subset of users, but rolling updates replace pods gradually across the entire cluster without user-based traffic splitting.
Detailed technical explanation
Under the hood, canary deployments in Kubernetes often use a service selector pointing to both stable and canary Deployments, with a smaller replica count for the canary. For precise traffic control, a service mesh like Istio can route a percentage of requests (e.g., 10%) to the canary pods using VirtualService and DestinationRule configurations. This method is critical for A/B testing in production without risking the entire user base.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
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FAQ
Deployment — This question tests Deployment — Read the scenario before looking for a memorised answer..
The correct answer is: Canary — A canary deployment releases the new version to a small subset of users (e.g., 5-10% of traffic) while the rest continue using the stable version. This allows the team to monitor performance, errors, and user feedback before gradually increasing the rollout. Kubernetes supports canary deployments natively through techniques like multiple Deployments with shared labels and service mesh traffic splitting (e.g., Istio or Linkerd).
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 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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