- A
Deployments support rolling updates and rollbacks
Deployments provide a declarative update strategy that supports rolling updates and rollbacks.
- B
Deployments ensure that a copy of a Pod runs on each node in the cluster
Why wrong: DaemonSets ensure a pod runs on each node.
- C
Deployments are used for batch processing jobs that run to completion
Why wrong: Batch jobs are managed by Jobs and CronJobs, not Deployments.
- D
Deployments manage the lifecycle of ReplicaSets
A Deployment creates a ReplicaSet and manages its scaling and updates.
- E
Deployments provide stable network identities for Pods
Why wrong: Stable network identities are provided by StatefulSets, not Deployments.
Question 837 of 997
Kubernetes Deployments
This KCNA practice question tests your understanding of kubernetes fundamentals. 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 of the following statements about Kubernetes Deployments are correct? (Select 2)
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
✓
Deployments support rolling updates and rollbacks
A is correct because Deployments provide a declarative update mechanism that supports rolling updates, where Pods are gradually replaced with new ones, and rollbacks, which revert the Deployment to a previous revision. This is achieved through the Deployment controller managing ReplicaSets, allowing seamless transitions between versions without downtime.
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.
- ✓
Deployments support rolling updates and rollbacks
Why this is correct
Deployments provide a declarative update strategy that supports rolling updates and rollbacks.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Deployments ensure that a copy of a Pod runs on each node in the cluster
Why it's wrong here
DaemonSets ensure a pod runs on each node.
- ✗
Deployments are used for batch processing jobs that run to completion
Why it's wrong here
Batch jobs are managed by Jobs and CronJobs, not Deployments.
- ✓
Deployments manage the lifecycle of ReplicaSets
Why this is correct
A Deployment creates a ReplicaSet and manages its scaling and updates.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Deployments provide stable network identities for Pods
Why it's wrong here
Stable network identities are provided by StatefulSets, not Deployments.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The CNCF exam often tests the distinction between Deployments and other controllers like DaemonSets, StatefulSets, and Jobs, so the trap here is confusing the purpose of Deployments (stateless, scalable apps) with controllers that handle per-node scheduling, stateful identities, or batch workloads.
Detailed technical explanation
How to think about this question
Under the hood, a Deployment creates a ReplicaSet with a unique hash in its label selector, and rolling updates incrementally scale down the old ReplicaSet while scaling up the new one, controlled by parameters like maxSurge and maxUnavailable (default 25%). The Deployment controller stores revision history in annotations, enabling rollbacks via `kubectl rollout undo`, which reverts to a previous ReplicaSet template. In real-world scenarios, this is critical for zero-downtime deployments in production, where misconfigured updates can be quickly reverted without manual intervention.
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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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: Deployments support rolling updates and rollbacks — A is correct because Deployments provide a declarative update mechanism that supports rolling updates, where Pods are gradually replaced with new ones, and rollbacks, which revert the Deployment to a previous revision. This is achieved through the Deployment controller managing ReplicaSets, allowing seamless transitions between versions without downtime.
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 →
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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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