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| Certification Vendor: | Red Hat |
|---|---|
| Exam Name: | Red Hat Certified OpenShift Administrator Exam |
| Exam Number: | EX280 |
| Available Languages: | Korean, Japanese, English, Simplified Chinese |
| Certificate Validity Period: | 3 years |
| Exam Price: | $400 USD |
| Exam Format: | Hands-on lab tasks, Performance-based, Scenario-based |
| Related Certifications: | Red Hat Certified Architect (RHCA) Red Hat Certified System Administrator (RHCSA) |
| Exam Duration: | 180 minutes |
| Passing Score: | 210 out of 300 |
| Real Exam Qty: | 15-17 performance-based tasks |
| Recommended Training: | DO280 - OpenShift Administration II: Operating a Production Kubernetes Cluster DO180 - OpenShift Administration I: Containers & Kubernetes |
| Exam Registration: | Red Hat Certification Central |
| Sample Questions: | RedHat EX280 Sample Questions |
| Exam Way: | Online proctored or onsite at authorized test centers |
| Pre Condition: | Recommended: RHCSA certification; completion of DO180 and DO280 courses or equivalent experience; basic Linux administration skills |
| Official Syllabus URL: | https://www.redhat.com/en/services/training/red-hat-certified-openshift-administrator-exam |
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The EX280 Exam is divided into two sections: a hands-on lab section and a multiple-choice section. In the hands-on lab section, candidates will be required to complete a set of tasks related to OpenShift administration within a specified time frame. The tasks will cover topics such as creating and managing applications, configuring network policies, and securing OpenShift environments. In the multiple-choice section, candidates will be tested on their knowledge of OpenShift architecture, deployment, and administration.
NEW QUESTION # 11
Create Resource Quota for Project Rocky
Task information Details:
Use project rocky and create a quota named rocky-quota with limits for CPU, memory, pods, services, replication controllers, and secrets.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
* Ensure the project exists and switch to it:
oc new-project rocky
oc project rocky
* Create the quota:
oc create quota rocky-quota \
--hard=limits.cpu=2,limits.memory=1Gi,pods=3,services=6,replicationcontrollers=6,secrets=6
* Verify:
oc get resourcequota -n rocky
oc describe quota rocky-quota -n rocky
Notes:
* The lab text uses cpu=2,memory=1G and secret=6; in real OpenShift usage, the more reliable forms are limits.cpu, limits.memory, and secrets.
* If the exam specifically expects the exact resource names shown in the lab environment, use what the cluster accepts.
This task checks quota enforcement and namespace resource governance.
NEW QUESTION # 12
Collect Cluster Information
Task information Details:
Run must-gather and archive the gathered data into a tar file.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
* Run must-gather:
oc adm must-gather
* Confirm the directory created, usually something like:
ls
* Archive the directory:
tar -cvzf system10-4ktjl-l4kj5l-lk45j.tar.gz must-gather.local.*
* Verify:
ls -lh *.tar.gz
Notes:
* The lab text shows a tar command without source paths. A valid tar command must include the source directory or files.
* Use the actual must-gather output directory generated in your environment.
This task validates support-data collection and cluster diagnostics handling.
NEW QUESTION # 13
Create LimitRanges for Project Darpa
Task information Details:
Switch to project darpa and create a LimitRange with Pod and Container minimums and maximums of CPU and memory, plus default container values.
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
* Switch to the target project:
oc project darpa
* Create a YAML file, for example limitrange.yaml:
apiVersion: v1
kind: LimitRange
metadata:
name: darpa-limits
namespace: darpa
spec:
limits:
- type: Pod
max:
cpu: 300m
memory: 300Mi
min:
cpu: 5m
memory: 5Mi
- type: Container
max:
cpu: 300m
memory: 300Mi
min:
cpu: 5m
memory: 5Mi
default:
cpu: 100m
memory: 100Mi
* Apply it:
oc apply -f limitrange.yaml
* Verify:
oc get limitrange -n darpa
oc describe limitrange darpa-limits -n darpa
This task validates namespace-level defaulting and constraint policies for pod scheduling and resource consumption.
NEW QUESTION # 14
Create Network Policy
Task information Details:
Create a NetworkPolicy named mysql-db-conn that permits ingress to database pods only from pods matching the specified labels in namespaces labeled team=devsecops , on TCP port 3306 .
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
* Create a file named mysql-db-conn.yaml:
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: mysql-db-conn
spec:
podSelector:
matchLabels:
networking.k8s.io/v1/network: database
policyTypes:
- Ingress
ingress:
- from:
- namespaceSelector:
matchLabels:
team: devsecops
podSelector:
matchLabels:
deployment: my-web-mysql
ports:
- protocol: TCP
port: 3306
* Apply it:
oc apply -f mysql-db-conn.yaml
* Verify:
oc get networkpolicy
oc describe networkpolicy mysql-db-conn
This task tests namespace/pod label selection and application isolation using OpenShift networking policy controls.
NEW QUESTION # 15
Scale an application automatically
Automatically scale the hydra application deployment configuration in the lerna project with the following requirements:
Minimum number of replicas: 6 Maximum number of replicas: 9
Target average CPU utilization: 60 percent Container CPU resource request: 25m Container CPU resource limit: 100m
Answer:
Explanation:
See the solution below in Explanation.
Explanation:
Solution:
$ oc project lerna
$ oc get pods
$ oc get all | grep deployment
$ oc autoscale deployment.apps/hydra --max=9 --min=6 --cpu-percent=60
$ oc get hpa
$ oc set resources deployment.apps/hydra --limits=cpu=100m -- requests=cpu=25m
$ oc describe deployment.apps/hydra | grep Limits -A3
NEW QUESTION # 16
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