This CKA practice question tests your understanding of workloads and scheduling. 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.
Which TWO statements are correct regarding DaemonSets?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
DaemonSets are often used for cluster monitoring or logging agents.
Option D is correct because DaemonSets are designed to run a copy of a pod on every node (or a subset of nodes based on node selectors), making them ideal for cluster-wide infrastructure services such as monitoring agents (e.g., Prometheus Node Exporter), logging agents (e.g., Fluentd), and network plugins (e.g., Calico). This pattern ensures that each node has the necessary agent running without manual intervention.
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.
✗
DaemonSets do not support rolling updates.
Why it's wrong here
DaemonSets support rolling updates via the updateStrategy field.
✗
DaemonSets can be scaled up and down using kubectl scale.
Why it's wrong here
Scaling a DaemonSet is not possible; you cannot add more pods than nodes.
✗
DaemonSets use a replica count to determine how many pods to run.
Why it's wrong here
DaemonSets do not have a replicas field; they run one pod per node.
✓
DaemonSets are often used for cluster monitoring or logging agents.
Why this is correct
Common use cases include node-level services like log collectors and monitoring agents.
Related concept
Read the scenario before looking for a memorised answer.
✓
DaemonSets ensure that all (or some) nodes run a copy of a pod.
Why this is correct
That is the primary function of a DaemonSet.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse DaemonSets with Deployments or StatefulSets, mistakenly thinking they support scaling via `kubectl scale` or use a replica count, when in fact DaemonSets are node-driven and scale automatically based on node membership.
Detailed technical explanation
How to think about this question
Under the hood, the DaemonSet controller watches the Kubernetes API for node additions and removals, and automatically creates or terminates pods to ensure one pod per matching node. This is fundamentally different from a Deployment, which uses a desired replica count and a ReplicaSet to maintain a fixed number of pods regardless of node count. In real-world scenarios, if a node fails, the DaemonSet controller does not reschedule the pod to another node (unlike a Deployment), because the pod is tied to that specific node's lifecycle.
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 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CKA question in full detail.
Workloads and Scheduling — This question tests Workloads and Scheduling — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: DaemonSets are often used for cluster monitoring or logging agents. — Option D is correct because DaemonSets are designed to run a copy of a pod on every node (or a subset of nodes based on node selectors), making them ideal for cluster-wide infrastructure services such as monitoring agents (e.g., Prometheus Node Exporter), logging agents (e.g., Fluentd), and network plugins (e.g., Calico). This pattern ensures that each node has the necessary agent running without manual intervention.
What should I do if I get this CKA 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.
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Question Discussion
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