A development team wants to manage 'Database' resources in Kubernetes, where each Database has a 'storageSize' and 'engine' field. They want to use kubectl to create, list, and delete these resources. What is the first step they must take?

Create a Namespace named 'databases' to host the custom resources.

Create a custom controller that watches Database resources.

Define a CustomResourceDefinition (CRD) for the Database kind.

Install the Operator Lifecycle Manager (OLM) to enable custom resources.

Which two Kubernetes primitives are typically used together to implement an operator?

Custom Resource Definitions (CRDs) and controllers

After applying a CRD manifest with kubectl apply, which command verifies that the CRD was successfully created in the cluster?

kubectl get api-resources --namespaced=true

An operator for 'Elasticsearch' is installed via OLM. The team wants to create an Elasticsearch cluster with 3 nodes. What is the correct way to do this?

Create a StatefulSet with 3 replicas manually.

Scale the operator's Deployment to 3 replicas.

Create an Elasticsearch custom resource with 'nodeCount: 3' in the spec.

Edit the ClusterServiceVersion to set the cluster size.

An operator for 'Kafka' is installed and running. The team wants to change the Kafka version from 2.8 to 3.0. What is the correct approach?

Edit the Kafka custom resource and change the 'version' field to 3.0.

Delete the Kafka cluster and recreate it with the new version.

Update the operator's Subscription to a newer version that supports Kafka 3.0.

Modify the operator's environment variables to set the Kafka version.

Certified Kubernetes Administrator (CKA)

Domain 4Objective 8

Understand CRDs, Install and Configure Operators CKA Practice Questions (Page 4)

Part of the Cluster Architecture, Installation and Configuration domain, which accounts for 25% of the CKA exam. Linux Foundation does not publish an official question count, but from its 120-minute exam (~50–80 total, ~13–20 in this domain), expect 2–3 from this objective — we provide 27 practice questions to prepare you well beyond it. (estimate)

27questions here

6free pages

7concepts

25%of the exam

Questions 16–20

16application · medium
A development team wants to manage 'Database' resources in Kubernetes, where each Database has a 'storageSize' and 'engine' field. They want to use kubectl to create, list, and delete these resources. What is the first step they must take?
Select an answer first
17foundation · easy
Which two Kubernetes primitives are typically used together to implement an operator?
Select an answer first
18foundation · easy
After applying a CRD manifest with kubectl apply, which command verifies that the CRD was successfully created in the cluster?
Select an answer first
19application · medium
An operator for 'Elasticsearch' is installed via OLM. The team wants to create an Elasticsearch cluster with 3 nodes. What is the correct way to do this?
Select an answer first
20application · medium
An operator for 'Kafka' is installed and running. The team wants to change the Kafka version from 2.8 to 3.0. What is the correct approach?
Select an answer first

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