KCNA Kubernetes Fundamentals Practice Question
You need to run a stateless web application with three replicas, and you want to ensure that if a pod fails, it is automatically replaced. Which Kubernetes resource should you use?
⚠ Common exam trap
Test-takers frequently confuse StatefulSet with Deployment for stateless apps because both manage replicas, but StatefulSet introduces ordered pod creation and persistent identities that are unnecessary and can cause overhead for stateless workloads.
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 at all times. If a pod fails, the Deployment's controller automatically creates a replacement pod, maintaining the stateless application's availability.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
DaemonSet
Why it's wrong here
DaemonSet ensures one pod per node, not a specific number of replicas.
- ✗
Job
Why it's wrong here
Job runs a batch task to completion, not a long-running service.
- ✗
StatefulSet
Why it's wrong here
StatefulSet is for stateful applications with stable identities, not needed for a stateless web app.
- ✓
Deployment
Why this is correct
Deployment creates a ReplicaSet to maintain the desired number of pod replicas and supports rolling updates.
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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.