EX280 Exam Preparation Material | Red Hat Certified OpenShift Administrator exam

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Prepare for the EX280 Red Hat Certified OpenShift Administrator exam with CertQueen's independently developed study resources. Review important concepts, practice scenario-based questions, and use clear explanations to identify areas that require further study.

Question#1

SIMULATION
Deploy an application
Deploy the application called oranges in the apples project so that the following conditions are true:
The application uses the ex280sa service account
No additional configuration components have been added or removed
The application produces output

A. Solution:
$ oc project mercury
$ oc get pods
$ oc get all | grep deploy
$ oc describe deployment.apps/atlas | grep -L memory
$ oc set resources deployment.apps/atlas --resources=memory=80Mi

Question#2

SIMULATION
Task 19
Create Project Template
Task information Details:
Generate the bootstrap project template, create it in openshift-config, update the cluster project configuration to use the template, and create a new project to validate it.

A. Solution:
Generate the default template:
oc adm create-bootstrap-project-template -o yaml > template.yaml Review and edit template.yaml if required. Create the template in openshift-config:
oc create -f template.yaml -n openshift-config
Edit the cluster project configuration:
oc edit project.config.openshift.io/cluster
Add or update:
spec:
projectRequestTemplate:
name: project-request
Save and exit.
Create a test project:
oc new-project test123
Verify the template behavior:
oc get project test123 -o yaml
Notes:
The uploaded lab text shows projects.config.openshift.io cluster-admin; the standard resource is project.config.openshift.io/cluster.
This task checks cluster-wide customization of new-project creation behavior.

Question#3

SIMULATION
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

A. 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

Question#4

SIMULATION
Configure limits
Configure your OpenShift cluster to use limits in the bluebook project with the following requirements:
The name of the LimitRange resource is: ex280-limits
The amount of memory consumed by a single pod is between 5Mi and 300Mi
The amount of memory consumed by a single container is between 5Mi and 300Mi with a default request value of 100Mi
The amount of CPU consumed by a single pod is between 10m and 500m
The amount of CPU consumed by a single container is between 10m and 500m with a default request value of 100m

A. Solution:
$ vim limit.yaml
# Edit the yaml file like below mentioned
apiVersion: "v1" kind: "LimitRange" metadata:
name: "resource-limits" spec:
limits:
- type: "Pod"
max:
cpu: "500m" memory: "300Mi"
min:
cpu: "10m" memory: "5Mi"
- type: "Container" max:
cpu: "500m" memory: "300Mi"
min:
cpu: "10m" memory: "5Mi"
defaultRequest: cpu: "100m" memory: "100Mi"
$ oc create -f limit.yaml --save-config -n bluebook
$ oc describe limitranges -n bluebook

Exam Code: EX280
Q & A: 33 Q&As         Updated:  Oct 08,2026

 

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What This EX280 Study Resource Helps You Do

Review Key Concepts

Review the technologies, products, processes, and practical skills covered by the current EX280 exam objectives.

Practice Scenario-Based Questions

Work through independently developed questions designed to strengthen your understanding of technical scenarios and decision-making.

Identify Knowledge Gaps

Use your results and the provided explanations to find weaker areas and focus your study more effectively.

How to Use This EX280 Preparation Material

Review the Exam Scope

Start by reviewing the topics covered by the EX280 exam. Compare them with the official exam objectives to understand the required technologies, operational tasks, and practical skills, then identify the areas that deserve the most attention.

Practice Independently

Complete a focused set of practice questions for each topic. On your first attempt, avoid referring to notes, answers, or other study resources so that you can evaluate your current understanding more accurately.

Study the Explanations

Review the answers and explanations after completing each practice session. Understand why the correct option is appropriate for the given scenario and why the other options may be incorrect or less suitable.

Close Knowledge Gaps

Keep track of incorrect answers, unfamiliar concepts, and weaker knowledge areas. Review these topics using official documentation and practical experience, then answer the related questions again to reinforce your understanding and monitor your progress.

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Exam Code: EX280
Q & A: 33 Q&As
Updated:  Oct 08,2026

 

 Access Complete EX280 Preparation Material