KCNA Container Orchestration Practice Question
You need to run a batch job that processes a queue and then terminates. Which Kubernetes resource should you use?
⚠ Common exam trap
CNCF often tests the misconception that a Deployment can be used for any workload, but the trap here is that a Deployment's restart policy (Always) makes it unsuitable for terminating batch jobs, whereas a Job's restart policy (OnFailure or Never) is specifically designed for finite tasks.
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 running a batch process that executes a finite task (e.g., processing a queue) and then terminates. Unlike controllers that maintain a desired state indefinitely, a Job creates one or more Pods and ensures they run to successful completion, after which the Job itself completes and no further Pods are created.
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 it's wrong here
Deployments are for long-running services, not batch jobs.
- ✗
DaemonSet
Why it's wrong here
DaemonSets run a Pod on every node.
- ✗
StatefulSet
Why it's wrong here
StatefulSets are for stateful applications with persistent identities.
- ✓
Job
Why this is correct
Jobs ensure a specified number of Pods successfully terminate, ideal for batch processing.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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