EX288 sample questions

Question 1

A developer needs to deploy an application to OpenShift using a Helm chart. The chart is stored in a local directory named ./my-chart. The developer wants to install the chart into the frontend project with the release name web-ui, setting the replica count to 3 via the command line.

Which command achieves this?

Accepted Answer

helm install web-ui ./my-chart --namespace frontend --set replicaCount=3

Answer

oc new-app ./my-chart --name web-ui -n frontend --param replicaCount=3

Answer

helm upgrade --install web-ui ./my-chart -n frontend --values replicaCount=3

Answer

oc create helm-release web-ui --source ./my-chart --project frontend --replicas 3

Question 2

You are managing a microservices application using Kustomize. You have a base directory containing the common resources and an overlays/prod directory for production-specific changes. You want to add a prefix prod- to all resources deployed from the production overlay and apply a common label env: prod.

Which fields should you add to the kustomization.yaml file in the overlays/prod directory?

Accepted Answer

namePrefix: prod- commonLabels: env: prod

Answer

resourcePrefix: prod- globalLabels: env: prod

Answer

prefix: prod- labels: env: prod

Answer

namespace: prod- selector: env: prod

Question 3

You need to create a Kubernetes Secret from a local file named db-creds.json to be used by a Pod. The key in the secret should be credentials.

Which command will create this secret in the current project?

Accepted Answer

oc create secret generic my-secret --from-file=credentials=db-creds.json

Answer

oc create secret json my-secret --data db-creds.json

Answer

oc secrets new my-secret credentials=db-creds.json

Answer

oc create secret generic my-secret --from-literal=credentials=@db-creds.json

Question 4

A developer wants to trigger a new build of an application automatically whenever a code change is pushed to the master branch of a GitHub repository. The OpenShift cluster is accessible from the internet.

Which TWO steps are required to achieve this? (Select TWO)

Accepted Answer

Define a GitHub webhook trigger in the `BuildConfig` using `type: GitHub`.

Accepted Answer

Configure a Webhook in the GitHub repository settings pointing to the OpenShift payload URL with the correct secret.

Answer

Configure a cron job in OpenShift to run `oc start-build`.

Answer

Create an ImageChangeTrigger in the `Deployment` resource.

Answer

Set the `git config` in the Pod to poll the repository every minute.

Question 5

You are creating an OpenShift Template to deploy a database. You want the user to be able to provide a password when processing the template, but if they do not provide one, the template should automatically generate a random 12-character alphanumeric string.

Which parameter definition correctly achieves this?

Accepted Answer

- name: DB_PASSWORD generate: expression from: "[a-zA-Z0-9]{12}"

Answer

- name: DB_PASSWORD value: auto-generate length: 12

Answer

- name: DB_PASSWORD required: true default: random(12)

Answer

- name: DB_PASSWORD generator: alphanumeric size: 12

Question 6

A developer has pushed a Docker image to the internal OpenShift image registry in the project myproject. The image stream is named myapp and the tag is v1. You want to verify the image metadata and signature.

Which command should you use to inspect the image details stored in the internal registry?

Accepted Answer

oc describe istag myapp:v1

Answer

oc get image myapp:v1 -o yaml

Answer

podman inspect docker://image-registry.openshift-image-registry.svc:5000/myproject/myapp:v1

Answer

oc registry info --image myapp:v1

EX288 Sample Questions & Answers

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EX288 Sample Questions & Answers

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