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RedHat EX280 Exam Syllabus Topics:

SectionObjectives
Topic 1: Networking and Ingress- Cluster networking
  • 1. Troubleshoot network connectivity
    • 2. Configure routes and ingress resources
      Topic 2: OpenShift Cluster Installation and Configuration- Cluster setup and installation verification
      • 1. Validate cluster health and components
        • 2. Install OpenShift clusters using installer-provisioned infrastructure
          Topic 3: Cluster Administration- Resource management
          • 1. Deploy and manage applications
            • 2. Manage projects, quotas, and limits
              - User and role management
              • 1. Configure users, groups, and RBAC
                • 2. Manage cluster roles and bindings
                  Topic 4: Security and Troubleshooting- Troubleshooting
                  • 1. Diagnose cluster and application issues
                    • 2. Analyze logs and events
                      - Security management
                      • 1. Configure authentication and authorization
                        • 2. Manage SCC (Security Context Constraints)
                          Topic 5: Storage and Persistence- Persistent storage configuration
                          • 1. Configure storage classes
                            • 2. Provision persistent volumes and claims

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                              RedHat Red Hat Certified Specialist in OpenShift Administration exam Sample Questions (Q13-Q18):

                              NEW QUESTION # 13
                              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 # 14
                              Start a Probe in Project Start
                              Task information Details:
                              Add a Liveness Probe to the deployment in project start using the Web Console.

                              Answer:

                              Explanation:
                              See the solution below in Explanation.
                              Explanation:
                              Solution:
                              * Open the Web Console.
                              * Switch to project start .
                              * Navigate to: Workloads # Deployments
                              * Select the target deployment.
                              * Click the action menu and choose: Add Health Checks
                              * Select Liveness Probe .
                              * Configure the appropriate probe type:
                              * HTTP
                              * TCP
                              * or Command
                              * Enter the required endpoint or command based on the application.
                              * Save the configuration.
                              * Verify the deployment updates successfully and the pod status remains healthy.
                              CLI alternative if needed:
                              oc set probe deployment/ < deployment-name >
                              --liveness --get-url=http://:8080/ --initial-delay-seconds=10
                              This task measures health-check configuration for workload self-recovery.


                              NEW QUESTION # 15
                              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 # 16
                              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.

                              Answer:

                              Explanation:
                              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.


                              NEW QUESTION # 17
                              Configure a secret
                              Configure a secret in the math project with the following requirements: The name of the secret is: magic The secret defines a key with name: decoder_ring The secret defines the key with value:
                              XpWy9KdcP3Tr9FFHGQgZgVRCKukQdrQsbcl0c2ZYhDk=

                              Answer:

                              Explanation:
                              See the solution below in Explanation.
                              Explanation:
                              Solution:
                              $ oc project math
                              $ oc create secret generic magic --from-literal key=decoder_ring --from- literal value=XpWy9KdcP3Tr9FFHGQgZgVRCKukQdrQsbcl0c2ZYhDk=
                              $ oc get secret -n math


                              NEW QUESTION # 18
                              ......

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