This KCNA practice question tests your understanding of container orchestration. 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.
You need to deploy an application that requires exactly one pod per cluster node for logging purposes. Which Kubernetes workload resource should you use?
DaemonSet
DaemonSet runs a pod on each node.
Job
Why wrong: Job runs to completion, not continuously.
StatefulSet
Why wrong: StatefulSet is for stateful apps with stable identity.
Deployment
Why wrong: Deployment does not guarantee one pod per node.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
DaemonSet
A DaemonSet ensures that a copy of a pod runs on every node in the cluster, or on a subset of nodes if a node selector is used. This is the correct resource for deploying a logging agent that must be present on each node to collect logs from that node's containers and system components.
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 this is correct
DaemonSet runs a pod on each node.
Related concept
Read the scenario before looking for a memorised answer.
Job
Why it's wrong here
Job runs to completion, not continuously.
StatefulSet
Why it's wrong here
StatefulSet is for stateful apps with stable identity.
Deployment
Why it's wrong here
Deployment does not guarantee one pod per node.
Common exam traps
The trap here is that candidates often confuse DaemonSet with Deployment, assuming a Deployment with replicas equal to the node count will achieve the same effect, but Deployments do not guarantee one pod per node and can schedule multiple pods on the same node or leave nodes empty.
Detailed technical explanation
Under the hood, the DaemonSet controller watches the Kubernetes API for node additions and removals, automatically creating or terminating pods to maintain exactly one per matching node. This is implemented via a controller loop that interacts with the scheduler to bypass normal scheduling constraints, ensuring pods land on every node even if taints or resource pressure would normally prevent it. In real-world scenarios, DaemonSets are used for node-level agents like kube-proxy, CNI plugins (e.g., Calico), and log shippers (e.g., Fluentd), where missing a node would result in incomplete cluster observability.
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
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FAQ
Container Orchestration — This question tests Container Orchestration — Read the scenario before looking for a memorised answer..
The correct answer is: DaemonSet — A DaemonSet ensures that a copy of a pod runs on every node in the cluster, or on a subset of nodes if a node selector is used. This is the correct resource for deploying a logging agent that must be present on each node to collect logs from that node's containers and system components.
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 24, 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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