- A
The update strategy is set to OnDelete, and you need to delete pods manually.
Why wrong: OnDelete would require manual deletion, but the default is RollingUpdate, and rollout status would not hang; it would simply not start until you delete pods.
- B
The StatefulSet's pod management policy is OrderedReady, and the first pod to update (db-2) is not becoming Ready.
StatefulSet updates pods in reverse ordinal order, waiting for each to become Ready before proceeding. If db-2 fails to become Ready, the rollout hangs.
- C
The maxSurge setting is preventing the update from starting.
Why wrong: StatefulSets do not have a maxSurge setting in their RollingUpdate strategy.
- D
The StatefulSet's service name is incorrect, causing DNS resolution failures.
Why wrong: While important for identity, it wouldn't cause rollout status to hang; pods would still be created.
CKA Workloads and Scheduling Practice Question
This CKA practice question tests your understanding of workloads and scheduling. 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.
A StatefulSet named 'db' has 3 replicas. You need to update the pod template to change the resource limits. After applying the change, you run 'kubectl rollout status sts db' and it hangs. What is the most likely reason?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
The StatefulSet's pod management policy is OrderedReady, and the first pod to update (db-2) is not becoming Ready.
Option B is correct because StatefulSets with the default OrderedReady pod management policy update pods sequentially in reverse order (from highest ordinal to lowest). When `kubectl rollout status sts db` hangs, it indicates that the update is stuck waiting for the first pod in the update sequence (db-2) to become Ready. If db-2 fails to become Ready due to the new resource limits (e.g., insufficient cluster resources or misconfigured limits), the rollout cannot proceed to update db-1 and db-0, causing the command to hang indefinitely.
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.
- ✗
The update strategy is set to OnDelete, and you need to delete pods manually.
Why it's wrong here
OnDelete would require manual deletion, but the default is RollingUpdate, and rollout status would not hang; it would simply not start until you delete pods.
- ✓
The StatefulSet's pod management policy is OrderedReady, and the first pod to update (db-2) is not becoming Ready.
Why this is correct
StatefulSet updates pods in reverse ordinal order, waiting for each to become Ready before proceeding. If db-2 fails to become Ready, the rollout hangs.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The maxSurge setting is preventing the update from starting.
Why it's wrong here
StatefulSets do not have a maxSurge setting in their RollingUpdate strategy.
- ✗
The StatefulSet's service name is incorrect, causing DNS resolution failures.
Why it's wrong here
While important for identity, it wouldn't cause rollout status to hang; pods would still be created.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse StatefulSet update behavior with Deployment behavior, assuming that maxSurge or maxUnavailable settings control the rollout, when in fact StatefulSets do not support those fields and rely on ordered pod management.
Detailed technical explanation
How to think about this question
StatefulSets use a podManagementPolicy of OrderedReady by default, which ensures that pods are created, updated, or deleted in strict ordinal order (e.g., db-0, then db-1, then db-2 for creation; reverse for updates). When a pod fails to become Ready after a template change, the controller blocks further updates to maintain ordering guarantees. In real-world scenarios, this often happens when resource limits are increased beyond available cluster capacity, causing the kubelet to fail to schedule the pod, or when liveness/readiness probes fail due to misconfigured limits.
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 CKA 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.
- →
Workloads and Scheduling — study guide chapter
Learn the concepts, then practise the questions
- →
Workloads and Scheduling practice questions
Targeted practice on this topic area only
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FAQ
Questions learners often ask
What does this CKA question test?
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: The StatefulSet's pod management policy is OrderedReady, and the first pod to update (db-2) is not becoming Ready. — Option B is correct because StatefulSets with the default OrderedReady pod management policy update pods sequentially in reverse order (from highest ordinal to lowest). When `kubectl rollout status sts db` hangs, it indicates that the update is stuck waiting for the first pod in the update sequence (db-2) to become Ready. If db-2 fails to become Ready due to the new resource limits (e.g., insufficient cluster resources or misconfigured limits), the rollout cannot proceed to update db-1 and db-0, causing the command to hang indefinitely.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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 →
Last reviewed: Jun 24, 2026
This CKA 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 CKA exam.
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