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| Certification Vendor: | Red Hat |
|---|---|
| Exam Name: | Red Hat Certified Specialist in OpenShift Administration exam |
| Exam Number: | EX280 |
| Passing Score: | not publicly disclosed |
| Exam Duration: | 180 minutes |
| Certificate Validity Period: | 3 years |
| Real Exam Qty: | not publicly disclosed (performance-based hands-on lab) |
| Available Languages: | English, Japanese, Chinese |
| Exam Format: | Command-line interface, No multiple choice questions, Performance-based hands-on lab |
| Exam Price: | USD 400 |
| Related Certifications: | Red Hat Certified Architect (RHCA) Red Hat Certified Specialist in OpenShift Application Development |
| Sample Questions: | RedHat EX280 Sample Questions |
| Exam Way: | In-person at Red Hat testing centers or online proctored exam |
| Pre Condition: | Recommended: Red Hat OpenShift Administration I (DO280) course or equivalent experience with containers, Kubernetes, and OpenShift |
| Official Syllabus URL: | https://www.redhat.com/en/services/certification/ex280 |
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Red Hat EX280, auch bekannt als Red Hat Certified Specialist in OpenShift Administration, ist eine Zertifizierungsprüfung, die die Fähigkeiten und Kenntnisse von Fachleuten bei der Verwaltung und Verwaltung von OpenShift -Containerplattform bestätigt. Diese Prüfung ist für IT -Fachkräfte, Systemadministratoren und Entwickler ausgelegt, die für die Bereitstellung, Verwaltung und Skalierung von Anwendungen für OpenShift verantwortlich sind.
25. Frage
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.
Antwort:
Begründung:
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
26. Frage
Configure an application to use a secret
Configure the application called qed in the math project with the following requirements:
The application uses the secret previously created called: magic The secret defines an environment variable with name: DECODER_RING The application output no longer displays: Sorry, application is not configured correctly.
Antwort:
Begründung:
See the solution below in Explanation.
Explanation:
Solution:
$ oc get all | grep deploy
$ oc set env --from=secret/magic deployment.apps/qed
27. Frage
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.
Antwort:
Begründung:
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.
28. Frage
Create Secure Route in Quart Project
Task information Details:
Create an edge route named htquart for service httpd , using the specified hostname and TLS certificate/key files.
Antwort:
Begründung:
See the solution below in Explanation.
Explanation:
Solution:
* Switch to the quart project:
oc project quart
* Create the secure route:
oc create route edge htquart \
--service=httpd \
--hostname=quart.apps.ocp4.example.com \
--cert=./req.crt \
--key=./req.key
* Verify:
oc get route htquart
oc describe route htquart
* Test resolution and access if DNS is available:
curl -k https://quart.apps.ocp4.example.com
This task checks route exposure, TLS termination, and secure ingress administration.
29. Frage
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 .
Antwort:
Begründung:
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.
30. Frage
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EX280 Zertifizierung: https://www.zertpruefung.ch/EX280_exam.html