This KCNA practice question tests your understanding of kubernetes fundamentals. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
You need to run a stateless web application with three replicas, and you want to ensure that if a pod fails, it is automatically replaced. Which Kubernetes resource should you use?
DaemonSet
Why wrong: DaemonSet ensures one pod per node, not a specific number of replicas.
Job
Why wrong: Job runs a batch task to completion, not a long-running service.
StatefulSet
Why wrong: StatefulSet is for stateful applications with stable identities, not needed for a stateless web app.
Deployment
Deployment creates a ReplicaSet to maintain the desired number of pod replicas and supports rolling updates.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Deployment
A Deployment manages ReplicaSets and provides declarative updates, including self-healing by recreating failed pods. A DaemonSet runs a pod on each node, a Job runs a batch task, and a StatefulSet is for stateful applications.
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.
DaemonSet
Why it's wrong here
DaemonSet ensures one pod per node, not a specific number of replicas.
Job
Why it's wrong here
Job runs a batch task to completion, not a long-running service.
StatefulSet
Why it's wrong here
StatefulSet is for stateful applications with stable identities, not needed for a stateless web app.
Deployment
Why this is correct
Deployment creates a ReplicaSet to maintain the desired number of pod replicas and supports rolling updates.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
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
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the KCNA 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
Identify which KCNA 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
Kubernetes Fundamentals — This question tests Kubernetes Fundamentals — Read the scenario before looking for a memorised answer..
The correct answer is: Deployment — A Deployment manages ReplicaSets and provides declarative updates, including self-healing by recreating failed pods. A DaemonSet runs a pod on each node, a Job runs a batch task, and a StatefulSet is for stateful applications.
Identify which KCNA 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.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 21, 2026
This KCNA practice question is part of Courseiva's free CNCF 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 KCNA exam.
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