200-901 Application Deployment and Security Practice Question
A developer wants to perform a rolling update of a Kubernetes Deployment. Which command will update the image and initiate the rollout?
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
✓
kubectl set image deployment/myapp myapp=myapp:v2
kubectl set image deployment updates the container image and triggers a rolling update if the deployment strategy is RollingUpdate (default).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
kubectl update deployment myapp --image=myapp:v2
Why it's wrong here
There is no 'kubectl update' command.
- ✓
kubectl set image deployment/myapp myapp=myapp:v2
Why this is correct
This updates the image for the container named 'myapp' in the deployment.
- ✗
kubectl edit deployment myapp --image=myapp:v2
Why it's wrong here
kubectl edit opens an editor; you cannot change image via flag.
- ✗
kubectl apply -f deployment.yaml --image=myapp:v2
Why it's wrong here
kubectl apply uses the file; you cannot specify image directly with --image flag.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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