KCNA Container Orchestration Practice Question
A company wants to run a batch job that processes data and then terminates. Which Kubernetes resource should they use?
⚠ Common exam trap
CNCF often tests the distinction between controllers that maintain a desired state (Deployment, DaemonSet) versus controllers that run to completion (Job, CronJob), and the trap here is that candidates may confuse a CronJob with a Job, forgetting that CronJob adds a scheduling layer for periodic execution, not for a single run.
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
✓
Job
A Job is the correct Kubernetes resource for a batch job that processes data and then terminates. Unlike controllers that maintain a desired state (like Deployments), a Job creates one or more Pods and ensures they run to successful completion. Once the specified number of Pods terminate successfully, the Job is considered complete and does not restart the Pods, making it ideal for one-off or finite processing tasks.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
CronJob
Why it's wrong here
CronJob runs Jobs on a schedule, but the question does not mention a schedule; a simple Job is appropriate.
- ✓
Job
Why this is correct
Jobs create one or more pods and ensure they successfully terminate, ideal for batch processing.
- ✗
Deployment
Why it's wrong here
Deployments aim to maintain a desired number of running pods; they are not intended for tasks that terminate.
- ✗
DaemonSet
Why it's wrong here
DaemonSets run a pod on every node continuously, not for one-time tasks.
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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.