Top 50 Red Hat OpenShift Interview Questions and Answers [2024]

Prepare for your Red Hat OpenShift interview with our comprehensive list of the top 50 interview questions and answers for 2024. Enhance your knowledge and boost your confidence with practical, real-world scenarios.

Interview Q & A Jul 3, 2024 2997 Add to Reading List

Top 50 Red Hat OpenShift Interview Questions and Answers [2024]

1. How do you create a new project in OpenShift?

Answer: You can create a new project in OpenShift using the following command:

oc new-project <project-name>

This command creates a new project with the specified name.

2. How do you deploy an application from a Docker image in OpenShift?

Answer: To deploy an application from a Docker image, use the following command:

oc new-app <docker-image>

This command creates a new application based on the specified Docker image.

3. How can you check the status of your deployed application in OpenShift?

Answer: You can check the status of your deployed application using the following command:

oc status

This command provides a high-level overview of your project's status.

4. How do you scale an application in OpenShift?

Answer: To scale an application, use the following command:

oc scale --replicas=<number-of-replicas> dc/<deployment-config-name>

This command scales the application to the specified number of replicas.

5. How do you view logs for a specific pod in OpenShift?

Answer: To view logs for a specific pod, use the following command:

oc logs <pod-name>

This command retrieves the logs for the specified pod.

6. How do you create a route for your application in OpenShift?

Answer: You can create a route using the following command:

oc expose svc/<service-name>

This command exposes the specified service as a route.

7. How do you import an existing image into OpenShift?

Answer: To import an existing image, use the following command:

oc import-image <image-name> --from=<registry-url> --confirm

This command imports the specified image from a registry into OpenShift.

8. How can you connect to a running pod in OpenShift?

Answer: To connect to a running pod, use the following command:

oc rsh <pod-name>

This command opens a shell session within the specified pod.

9. How do you delete a project in OpenShift?

Answer: To delete a project, use the following command:

oc delete project <project-name>

This command deletes the specified project and all its resources.

10. How do you view all the resources in your current project in OpenShift?

Answer: To view all the resources in your current project, use the following command:

oc get all

This command lists all the resources (pods, services, routes, etc.) in your current project.

11. How do you create a secret in OpenShift?

Answer: To create a secret, use the following command:

oc create secret generic <secret-name> --from-literal=<key>=<value>

This command creates a generic secret with the specified key-value pair.

12. How do you configure environment variables for a deployment in OpenShift?

Answer: You can set environment variables using the following command:

oc set env dc/<deployment-config-name> <key>=<value>

This command sets the specified environment variable for the deployment config.

13. How do you patch a resource in OpenShift?

Answer: To patch a resource, use the following command:

oc patch <resource-type>/<resource-name> --patch '<patch-data>'

This command applies the specified patch to the resource.

14. How do you create a persistent volume claim (PVC) in OpenShift?

Answer: To create a PVC, you need to define a YAML file and then apply it using the following command:

oc apply -f <pvc-definition-file>.yaml

This command creates the PVC based on the YAML definition file.

15. How do you get details of a specific resource in OpenShift?

Answer: To get details of a specific resource, use the following command:

oc describe <resource-type> <resource-name>

This command provides detailed information about the specified resource.

16. How do you label a resource in OpenShift?

Answer: To label a resource, use the following command:

oc label <resource-type>/<resource-name> <label-key>=<label-value>

This command adds the specified label to the resource.

17. How do you create a new application from a template in OpenShift?

Answer: To create a new application from a template, use the following command:

oc new-app --template=<template-name>

This command creates a new application based on the specified template.

18. How do you set a resource limit for a container in OpenShift?

Answer: To set a resource limit, use the following command:

oc set resources dc/<deployment-config-name> --limits=cpu=<cpu-limit>,memory=<memory-limit>

This command sets the CPU and memory limits for the specified deployment config.

19. How do you create a cron job in OpenShift?

Answer: To create a cron job, define a cron job YAML file and then apply it using the following command:

oc apply -f <cronjob-definition-file>.yaml

This command creates the cron job based on the YAML definition file.

20. How do you delete a pod in OpenShift?

Answer: To delete a pod, use the following command:

oc delete pod <pod-name>

This command deletes the specified pod.

21. How do you restart a deployment in OpenShift?

Answer: To restart a deployment, use the following command:

oc rollout restart deployment/<deployment-name>

This command restarts the specified deployment.

22. How do you check the history of deployments in OpenShift?

Answer: To check the history of deployments, use the following command:

oc rollout history dc/<deployment-config-name>

This command shows the history of rollouts for the specified deployment config.

23. How do you roll back to a previous deployment in OpenShift?

Answer: To roll back to a previous deployment, use the following command:

oc rollback dc/<deployment-config-name> --to-revision=<revision-number>

This command rolls back the specified deployment config to the specified revision.

24. How do you create a custom role in OpenShift?

Answer: To create a custom role, define a role YAML file and then apply it using the following command:

oc apply -f <role-definition-file>.yaml

This command creates the custom role based on the YAML definition file.

25. How do you assign a role to a user in OpenShift?

Answer: To assign a role to a user, use the following command:

oc adm policy add-role-to-user <role-name> <username>

This command assigns the specified role to the specified user.

26. How do you check the events in a project in OpenShift?

Answer: To check the events, use the following command:

oc get events

This command lists the events in the current project.

27. How do you set up a service account in OpenShift?

Answer: To create a service account, use the following command:

oc create serviceaccount <service-account-name>

This command creates a new service account with the specified name.

28. How do you assign a service account to a pod in OpenShift?

Answer: To assign a service account to a pod, specify the service account in the pod's YAML definition file under the `spec.serviceAccountName` field, then apply the file using the following command:

oc apply -f <pod-definition-file>.yaml

This command assigns the specified service account to the pod.

29. How do you create a network policy in OpenShift?

Answer: To create a network policy, define a network policy YAML file and then apply it using the following command:

oc apply -f <network-policy-definition-file>.yaml

This command creates the network policy based on the YAML definition file.

30. How do you monitor resource usage in OpenShift?

Answer: To monitor resource usage, you can use the OpenShift Web Console or use the following command to get resource usage details:

oc adm top nodes

This command shows the resource usage (CPU and memory) of nodes in the cluster.