Bird
0
0

You want to update environment variables in a running pod without rebuilding the container image. Which approach using ConfigMaps is correct?

hard📝 Workflow Q15 of 15
Kubernetes - ConfigMaps
You want to update environment variables in a running pod without rebuilding the container image. Which approach using ConfigMaps is correct?
AUse a Secret instead of ConfigMap for environment variables
BModify the container image to include new environment variables
CCreate or update a ConfigMap and reference it with <code>envFrom</code> in the pod spec, then restart the pod
DEdit the pod spec to add environment variables directly and redeploy the image
Step-by-Step Solution
Solution:

  1. Step 1: Understand ConfigMap update workflow

    ConfigMaps allow updating config data separately; updating the ConfigMap and restarting the pod applies new env vars without rebuilding images.

  2. Step 2: Evaluate options for best practice

    Create or update a ConfigMap and reference it with envFrom in the pod spec, then restart the pod correctly uses ConfigMap with envFrom and pod restart. Others require image rebuild or confuse Secrets with ConfigMaps.

  3. Final Answer:

    Create or update a ConfigMap and reference it with envFrom in the pod spec, then restart the pod -> Option C

  4. Quick Check:

    Update ConfigMap + restart pod for new env vars [OK]
Quick Trick: Update ConfigMap and restart pod, no image rebuild needed [OK]
Common Mistakes:
  • Rebuilding container image unnecessarily
  • Confusing Secrets with ConfigMaps for non-sensitive data
  • Editing pod spec without restarting pod

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More Kubernetes Quizzes
ConfigMaps - Updating ConfigMaps and propagation - Quiz 7medium ConfigMaps - Updating ConfigMaps and propagation - Quiz 15hard ConfigMaps - Using ConfigMaps as mounted volumes - Quiz 15hard ConfigMaps - Creating ConfigMaps from literals - Quiz 9hard Health Checks and Probes - Why probes keep applications healthy - Quiz 8hard Ingress - Host-based routing - Quiz 1easy Ingress - Why Ingress manages external access - Quiz 1easy Networking - Pod-to-Pod communication - Quiz 9hard Resource Management - Memory requests and limits - Quiz 9hard Secrets - Secret types (Opaque, docker-registry, TLS) - Quiz 11easy