Exam Name: Red Hat Certified Specialist in OpenShift Administration exam
Certification Provider: RedHat
Corresponding Certification: Red Hat Certified Architect (RHCA)
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What is the RedHat EX280 Exam?
RedHat EX280 exam is a certification that helps you to prove your expertise in RedHat OpenShift Administration. You will be able to demonstrate your ability to install, configure, and maintain a RedHat OpenShift environment. This certification demonstrates that the holder has a deep understanding of RedHat OpenShift Administration, and can install, configure and maintain a RedHat OpenShift environment.
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Reference: https://www.redhat.com/en/services/training/red-hat-certified-openshift-administrator-exam
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RedHat EX280 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Security and Troubleshooting | - Security management
|
| Topic 2: OpenShift Cluster Installation and Configuration | - Cluster setup and installation verification
|
| Topic 3: Networking and Ingress | - Cluster networking
|
| Topic 4: Cluster Administration | - Resource management
|
| Topic 5: Storage and Persistence | - Persistent storage configuration
|
RedHat Red Hat Certified Specialist in OpenShift Administration Sample Questions:
Configure a secure route
Configure the oxcart application in the area51 project with the following requirements:
The application uses a route called oxcart
The application uses a CA signed certificate with the following subject fields:
/C=US/ST=NV/L=Hiko/O=CIA/OU=USAF/CN=classified.apps.domainxx.example.com The application is reachable only at the following address: https://classified.apps.domainxx.example.com The application produces output A utility script called newcert has been provided to create the CA signed certificate. You may enter the certificate parameters manually or pass the subject as a parameter.
Your certificate signing request will be uploaded to the CA where it will immediately be signed and then downloaded to your current directory.
Correct Answer:
See the solution below in Explanation.
Explanation:
Solution:
$ oc project area51
$ oc get pods
$ oc get all | grep deployment
$ oc get route
$ oc delete route oxcart
$ openssl genrsa -out ex280.key 2048
$ openssl req -new -key ex280.key -out ex280.csr -subj "/C=US/ST=NV/L=Hiko/O=CIA/OU=USAF
/CN=classified.apps.domainxx.example.com"
$ openssl x509 -req -in ex280.csr -signkey ex280.key -out ex280.crt
$ oc create route edge oxcart --service oxcart --key ex280.key --cert ex280.crt --hostname classified.apps.
domainxx.example.com
$ oc get route
$ oc get svc
Autoscale of Pods
Task information Details:
Create an HPA for httpd with min=2 , max=9 , and CPU target 60% .
Set resource requests on the httpd deployment so autoscaling can function properly.
Correct Answer:
See the solution below in Explanation.
Explanation:
Solution:
* Set resource requests on the deployment:
oc set resources deployment httpd --requests=cpu=50m,memory=100Mi
* Create the HPA:
oc autoscale deployment httpd --min=2 --max=9 --cpu-percent=60
* Verify:
oc get hpa
oc describe hpa httpd
oc get deployment httpd -o yaml
Why resource requests matter:
* HPA CPU utilization is calculated against requested CPU.
* Without requests, percentage-based autoscaling is incomplete or invalid.
This task focuses on autoscaling prerequisites and policy creation.
Create Secret with Name Magic in Math Project
Task information Details:
Create a secret named magic in the math project that stores MYSQL_ROOT_PASSWORD=redhat .
Correct Answer:
See the solution below in Explanation.
Explanation:
Solution:
* Switch to the math project:
oc project math
* Create the secret:
oc create secret generic magic --from-literal=MYSQL_ROOT_PASSWORD=redhat
* Verify:
oc get secret magic
oc describe secret magic
Note:
* The uploaded lab text contains a typo --from-listeral; the valid option is --from-literal.
* The output in the lab also appears inconsistent. The intended secret name is magic .
This task checks secret creation and secure configuration data handling.
Deploy Application in the Project QED
Task information Details:
Set the service account for the specified deployment in project qed to project1-sa .
Correct Answer:
See the solution below in Explanation.
Explanation:
Solution:
* Ensure you are in the correct project:
oc project qed
* Set the service account on the deployment:
oc set serviceaccount deployment/gitlab-skdjfklj project1-sa
* Verify:
oc get deployment gitlab-skdjfklj -o yaml | grep serviceAccount
oc describe deployment gitlab-skdjfklj
* If required, restart rollout:
oc rollout restart deployment/gitlab-skdjfklj
This task checks workload identity assignment through service accounts.
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