KCNA Kubernetes Fundamentals Practice Question
A developer needs to deploy a stateless application with three replicas and ensure that updates are rolled out with zero downtime. Which Kubernetes resource is most appropriate?
⚠ Common exam trap
The trap here is that candidates might choose StatefulSet because they associate 'replicas' with stateful workloads, but the question explicitly states 'stateless application,' making Deployment the correct choice for rolling updates with zero downtime.
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
✓
Deployment
A Deployment is the correct resource because it manages a ReplicaSet to ensure the desired number of pod replicas (three) are running, and it supports rolling updates with configurable strategies (e.g., maxSurge and maxUnavailable) to achieve zero-downtime updates. Stateless applications are ideal for Deployments since pods are interchangeable and can be replaced without data loss.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Deployment
Why this is correct
Deployment manages ReplicaSets and supports rolling updates.
- ✗
StatefulSet
Why it's wrong here
StatefulSet is for stateful applications with stable identities.
- ✗
Job
Why it's wrong here
Job is for batch tasks, not long-running services.
- ✗
DaemonSet
Why it's wrong here
DaemonSet ensures one pod per node, not suitable for a specific number of replicas.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.