- A
Service mesh (e.g., Istio, Linkerd)
Service mesh can route a percentage of traffic to the canary version.
- B
Horizontal Pod Autoscaler
Why wrong: HPA scales pods based on CPU/memory, not for canary rollout automation.
- C
Monitoring system (e.g., Prometheus)
Monitoring collects metrics like error rate to evaluate canary health.
- D
Progressive delivery tool (e.g., Flagger, Argo Rollouts)
Such tools automate traffic shifting and rollback based on metrics.
- E
Kubernetes Service with label selectors
Why wrong: A Service alone does not provide traffic splitting by percentage.
Question 962 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.
An organization is implementing a canary deployment strategy for a microservice running on Kubernetes. The deployment should automatically roll back if the error rate exceeds 2% within the first 5 minutes. Which THREE components are essential for implementing this strategy? (Choose three.)
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"first"Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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
✓
Service mesh (e.g., Istio, Linkerd)
To implement canary with automatic rollback, you need a traffic split mechanism (service mesh), monitoring (Prometheus), and progressive delivery tool (Flagger).
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.
- ✓
Service mesh (e.g., Istio, Linkerd)
Why this is correct
Service mesh can route a percentage of traffic to the canary version.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Horizontal Pod Autoscaler
Why it's wrong here
HPA scales pods based on CPU/memory, not for canary rollout automation.
- ✓
Monitoring system (e.g., Prometheus)
Why this is correct
Monitoring collects metrics like error rate to evaluate canary health.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Progressive delivery tool (e.g., Flagger, Argo Rollouts)
Why this is correct
Such tools automate traffic shifting and rollback based on metrics.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Kubernetes Service with label selectors
Why it's wrong here
A Service alone does not provide traffic splitting by percentage.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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.
Identify which CV0-004 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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: Service mesh (e.g., Istio, Linkerd) — To implement canary with automatic rollback, you need a traffic split mechanism (service mesh), monitoring (Prometheus), and progressive delivery tool (Flagger).
What should I do if I get this CV0-004 question wrong?
Identify which CV0-004 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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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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