EX280 sample questions

Question 1

A developer reports that their application deployment in the 'frontend' project is failing to create new pods. Upon investigation, you see the message 'Forbidden: exceeded quota: compute-resources, requested: requests.cpu=200m, used: requests.cpu=1900m, limited: requests.cpu=2'. Running 'oc get resourcequota -n frontend' lists the quota 'compute-resources'. What is the most immediate cause of this issue?

Accepted Answer

The project's ResourceQuota for CPU requests would be exceeded by the new pod.

Answer

The cluster-wide ClusterResourceQuota has been exhausted for this user.

Answer

The LimitRange for the project requires a minimum CPU request that the pod does not meet.

Answer

The node running the pods has run out of CPU capacity.

Question 2

You are configuring an HTPasswd identity provider for an OpenShift 4 cluster. You have already created the 'htpasswd' file with the user credentials. Which of the following sequences correctly describes the next steps to activate this authentication mechanism?

Accepted Answer

Create a Secret from the file in 'openshift-config', then reference it in the 'OAuth' cluster resource.

Answer

Run 'oc adm policy add-scc-to-user' to link the file to the authentication operator.

Answer

Copy the file to the master nodes /etc/origin/master directory and restart the API server.

Answer

Create a ConfigMap in the 'openshift-authentication' namespace and redeploy the router.

Question 3

Your organization requires a specific set of Kustomize overlays for deploying an application to Development, Stage, and Production environments. You have a 'base' directory containing the common deployment.yaml and service.yaml. You need to ensure the Production overlay scales the replicas to 5 and changes the image tag to 'stable'.

Which file structure and content is correct for the production overlay?

Accepted Answer

Create a 'production' directory. In 'kustomization.yaml', add 'resources: [../base]' and a 'patches' list targeting the Deployment to update replicas and image.

Answer

Create a Helm chart in the production directory and use 'helm install' to reference the base kustomization.

Answer

Edit the base deployment.yaml directly to use variables like ${REPLICAS} and ${IMAGE_TAG}, then pass these variables during 'oc apply'.

Answer

Copy all YAML files from base to production directory and manually edit the values in the new files.

Question 4

You need to grant a specific user, 'alice', the ability to view all resources in the 'marketing' project only, not in other projects, and the user should not be able to modify any resources. Which command achieves this using the default ClusterRoles?

Accepted Answer

oc adm policy add-role-to-user view alice -n marketing

Answer

oc create rolebinding alice-view --clusterrole=edit --user=alice -n marketing

Answer

oc adm policy add-cluster-role-to-user view alice -n marketing

Answer

oc policy add-user alice --role=read-only -n marketing

Question 5

A database pod in the 'db-prod' project keeps restarting with an 'OOMKilled' error. Its only container has a 1Gi memory limit and needs 2Gi. The project has a ResourceQuota 'quota-prod' with 'limits.memory: 10Gi', and 9.5Gi is already used, including this pod's 1Gi. What must you do to successfully deploy the fix?

Accepted Answer

First increase the 'limits.memory' in the ResourceQuota 'quota-prod', then increase the pod's memory limit.

Answer

Increase the pod's memory limit in the deployment configuration.

Answer

Use the 'oc scale' command to reduce the number of replicas to 0, update the pod definition, and scale back up.

Answer

Delete the LimitRange in the project to bypass the quota check.

Question 6

You are installing the Web Terminal Operator from the software catalog. You want it installed for all namespaces and updated automatically whenever a new version appears in its 'fast' channel. Which resource should you configure to define the channel and approval strategy?

Accepted Answer

Subscription

Answer

InstallPlan

Answer

OperatorGroup

Answer

CatalogSource

Free EX280 sample questions

You are configuring an HTPasswd identity provider for an OpenShift 4 cluster. You have already created the 'htpasswd' file with the user credentials. Which of the following sequences correctly describes the next steps to activate this authentication mechanism?

You need to grant a specific user, 'alice', the ability to view all resources in the 'marketing' project only, not in other projects, and the user should not be able to modify any resources. Which command achieves this using the default ClusterRoles?

You are installing the Web Terminal Operator from the software catalog. You want it installed for all namespaces and updated automatically whenever a new version appears in its 'fast' channel. Which resource should you configure to define the channel and approval strategy?

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