KCNA Kubernetes Fundamentals Practice Question
A development team deploys a microservice that crashes every few minutes. The deployment uses a single replica, and the pod restarts repeatedly. Which Kubernetes feature should be enabled to ensure the service remains available during failures?
⚠ Common exam trap
Test-takers frequently confuse health probes (readiness/liveness) with redundancy; while probes help detect and manage unhealthy pods, they do not provide the multiple running instances needed to maintain availability during a crash.
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
✓
Increase the replicas in the Deployment to at least 2
Increasing the replicas to at least 2 ensures that if one pod crashes, the other replica(s) can continue serving traffic, maintaining availability. With only a single replica, the service becomes unavailable every time the pod restarts. This is the most direct way to provide redundancy and fault tolerance for a stateless microservice.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Move the deployment to a separate namespace
Why it's wrong here
Namespaces provide logical separation but do not affect pod resilience.
- ✓
Increase the replicas in the Deployment to at least 2
Why this is correct
Increasing replicas allows the ReplicaSet to maintain multiple copies, so if one crashes, others still serve traffic.
- ✗
Store the application configuration in a ConfigMap
Why it's wrong here
ConfigMaps decouple configuration from pods but do not improve availability.
- ✗
Add a readiness probe to the pod
Why it's wrong here
Readiness probes control when a pod receives traffic, but do not create additional replicas.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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