Your team maintains a single Kubernetes deployment YAML for a web application. You now need to support three environments (dev, staging, prod) that differ only in replica count and image tag. You want to avoid duplicating the entire deployment for each environment. Which approach should you use?

Create three separate deployment YAML files and use a shell script to select the correct one for each environment.

Use kubectl apply with the --namespace flag and a different YAML file for each environment.

Create a single deployment YAML with environment variables that are set at runtime by the container image.

Create a base kustomization with the common deployment and three overlay kustomizations that each reference the base and patch the replica count and image.

What is the purpose of using overlays in Kustomize?

To store secrets in a more secure way

To create environment-specific variations of a base configuration

To combine multiple clusters into a single configuration

To replace the base configuration entirely with a new set of resources

You have multiple overlays (dev, staging, prod) that all need to add the same sidecar container to a Deployment. You want to define this sidecar addition once and reuse it across all overlays. What is the best way to do this?

Create a Kustomize component that contains the sidecar patch and reference it from each overlay.

Add the sidecar to the base Deployment and use overlays only for environment-specific changes.

Copy the sidecar patch into each overlay's kustomization.yaml.

Use a JSON patch in each overlay that adds the sidecar.

Certified Kubernetes Application Developer (CKAD)

Domain 5Objective 1

Kustomize CKAD Practice Questions (Page 5)

Part of the Services and Networking domain, which accounts for 20% of the CKAD exam. Linux Foundation does not publish an official question count, but from its 120-minute exam (~50–80 total, ~10–16 in this domain), expect 10–16 from this objective — we provide 30 practice questions to prepare you well beyond it. (estimate)

30questions here

6free pages

10concepts

20%of the exam

Questions 21–25

21foundation · easy
Which built-in transformer in Kustomize sets the number of replicas for a Deployment?
Select an answer first
22foundation · easy
Which field in a kustomization.yaml file is used to list the Kubernetes resources that Kustomize should process?
Select an answer first
23application · medium
Your team maintains a single Kubernetes deployment YAML for a web application. You now need to support three environments (dev, staging, prod) that differ only in replica count and image tag. You want to avoid duplicating the entire deployment for each environment. Which approach should you use?
Select an answer first
24foundation · easy
What is the purpose of using overlays in Kustomize?
Select an answer first
25application · medium
You have multiple overlays (dev, staging, prod) that all need to add the same sidecar container to a Deployment. You want to define this sidecar addition once and reuse it across all overlays. What is the best way to do this?
Select an answer first

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Kustomize CKAD Practice Questions (Page 5)

Questions 21–25

Which built-in transformer in Kustomize sets the number of replicas for a Deployment?

Which field in a kustomization.yaml file is used to list the Kubernetes resources that Kustomize should process?

Your team maintains a single Kubernetes deployment YAML for a web application. You now need to support three environments (dev, staging, prod) that differ only in replica count and image tag. You want to avoid duplicating the entire deployment for each environment. Which approach should you use?

What is the purpose of using overlays in Kustomize?

You have multiple overlays (dev, staging, prod) that all need to add the same sidecar container to a Deployment. You want to define this sidecar addition once and reuse it across all overlays. What is the best way to do this?

Keep studying — Services and Networking