- A
DaemonSet
Why wrong: DaemonSet runs one pod per node, not suitable for stateful workloads needing unique identities.
- B
Deployment
Why wrong: Deployment provides stateless scaling, pods get random names and identities.
- C
StatefulSet
StatefulSet gives each pod a sticky identity and can manage persistent storage per pod.
- D
Job
Why wrong: Job is for batch processing, not long-running stateful services.
Question 610 of 997
StatefulSet for Stateful Applications
This KCNA practice question tests your understanding of kubernetes fundamentals. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 team wants to deploy a stateful application that requires each pod to have a unique, stable network identity and persistent storage that persists across rescheduling. Which Kubernetes resource is most appropriate?
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
✓
StatefulSet
StatefulSet is the correct choice because it provides each pod with a unique, stable network identity (via a predictable hostname derived from the StatefulSet name and ordinal index) and dedicated persistent storage that persists across rescheduling. This is achieved through a headless Service and PersistentVolumeClaims (PVCs) that are bound to each pod's identity, ensuring that when a pod is rescheduled, it reattaches to the same storage and retains its network identity.
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.
- ✗
DaemonSet
Why it's wrong here
DaemonSet runs one pod per node, not suitable for stateful workloads needing unique identities.
- ✗
Deployment
Why it's wrong here
Deployment provides stateless scaling, pods get random names and identities.
- ✓
StatefulSet
Why this is correct
StatefulSet gives each pod a sticky identity and can manage persistent storage per pod.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Job
Why it's wrong here
Job is for batch processing, not long-running stateful services.
Common exam traps
Common exam trap: answer the scenario, not the keyword
A common mistake is to think that a Deployment can be used for stateful workloads because it supports PersistentVolumeClaims. However, Deployment does not guarantee stable pod identities or ordered pod creation/termination, which are essential for stateful applications like databases.
Detailed technical explanation
How to think about this question
Under the hood, StatefulSet uses a headless Service (with clusterIP: None) to enable DNS-based pod identity, where each pod gets a DNS record like <statefulset-name>-<ordinal>.<service-name>. For persistent storage, StatefulSet uses a VolumeClaimTemplate that automatically creates a unique PVC for each pod, and the PVC is retained even if the pod is deleted, ensuring data persistence. A real-world scenario is deploying a Cassandra cluster where each node must maintain its own data directory and be reachable by a fixed hostname for gossip protocol communication.
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 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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Kubernetes Fundamentals — study guide chapter
Learn the concepts, then practise the questions
- →
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Targeted practice on this topic area only
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Kubernetes and Cloud Native Associate KCNA study guide
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KCNA practice test guide
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FAQ
Questions learners often ask
What does this KCNA question test?
Kubernetes Fundamentals — This question tests Kubernetes Fundamentals — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: StatefulSet — StatefulSet is the correct choice because it provides each pod with a unique, stable network identity (via a predictable hostname derived from the StatefulSet name and ordinal index) and dedicated persistent storage that persists across rescheduling. This is achieved through a headless Service and PersistentVolumeClaims (PVCs) that are bound to each pod's identity, ensuring that when a pod is rescheduled, it reattaches to the same storage and retains its network identity.
What should I do if I get this KCNA 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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more ways this is tested on KCNA
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. An application requires a unique identifier per replica, stored in an environment variable. Which Kubernetes resource should be used to inject this identifier into each pod without manual updates?
hard- A.Deployment with pod anti-affinity to schedule each pod on a different node.
- ✓ B.StatefulSet with an environment variable derived from the pod name.
- C.DaemonSet with a node name environment variable.
- D.Job with a completion index environment variable.
Why B: A StatefulSet provides stable, unique network identities and ordered pod naming (e.g., pod-0, pod-1). The pod name can be exposed as an environment variable using the Downward API or Kubernetes hostname field, giving each replica a unique identifier without manual updates. Deployments create identical pods with no ordering, DaemonSets run one pod per node, and Jobs are for batch processing, so only a StatefulSet meets the requirement.
Keep practising
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Last reviewed: Jul 4, 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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