EX288 sample questions

Question 1

A developer is customizing a Source-to-Image (S2I) build for a Python application. During the image build, right after the dependencies are installed, a configuration file must be generated from build environment variables, so that the file is part of the final image. The developer decides to provide a custom S2I script in the source repository.

Which script must the developer create, and where should it be placed in the source code repository to override the default behavior?

Accepted Answer

Create a script named `assemble` and place it in `.s2i/bin/`.

Answer

Create a script named `usage` and place it in the root directory.

Answer

Create a script named `run` and place it in `.s2i/bin/`.

Answer

Create a script named `save-artifacts` and place it in `s2i/scripts/`.

Question 2

You are deploying a legacy Java application that takes approximately 90 seconds to initialize and accept connections. You configure a Liveness probe to check the endpoint `/healthz` every 10 seconds. During deployment, you observe that the Pod enters a `CrashLoopBackOff` state because the Liveness probe fails before the application is ready.

Which configuration change is the BEST practice to resolve this issue without compromising the ongoing failure detection capability?

Accepted Answer

Add a `startupProbe` on `/healthz` whose `failureThreshold` times `periodSeconds` covers 90 seconds.

Answer

Remove the Liveness probe and rely solely on the Readiness probe.

Answer

Increase the `initialDelaySeconds` of the Liveness probe to 100 seconds.

Answer

Change the Liveness probe type from `httpGet` to `exec` to run a script that sleeps for 90 seconds.

Question 3

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 4

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 5

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 6

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

Add a webhook in the GitHub repository settings that uses the BuildConfig's payload URL.

Accepted Answer

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

Answer

Create an ImageChangeTrigger in the `Deployment` resource.

Answer

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

Answer

Add a `type: GitPoll` trigger to the BuildConfig so that it polls the GitHub repository.

Free EX288 sample questions

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?

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)

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