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RedHat EX280 Exam Syllabus Topics:

SectionWeightObjectives
Deploy and Manage Applications25%- Deploy applications from multiple sources
  • 1. Use YAML manifests, templates and Helm charts
    • 2. Use Kustomize and overlays
      - Manage application lifecycles
      • 1. Update and rollback deployments
        • 2. Manage replica sets and scaling
          Work with Kubernetes Resources25%- Manage configuration data
          • 1. Create and use Secrets
            • 2. Create and use ConfigMaps
              - Query, filter and modify resource attributes
              • 1. Import/export and configure manifests
                • 2. Use labels, selectors and annotations
                  Manage OpenShift Container Platform20%- Manage and configure clusters via web console and CLI
                  • 1. Monitor events, alerts and logs
                    • 2. Examine cluster status and resources
                      • 3. Create and delete projects
                        - Work with container images
                        • 1. Manage image streams and registries
                          • 2. Locate, identify and examine images
                            Configure Networking and Access15%- Troubleshoot software-defined networking
                            - Expose services externally
                            • 1. Create and manage routes
                              • 2. Control ingress and network policies
                                Manage Authentication and Authorization15%- Configure identity providers
                                • 1. Set up HTPasswd and other providers
                                  - Manage users, groups and permissions
                                  • 1. Create/delete users and modify passwords
                                    • 2. Assign roles and adjust access rights

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                                      RedHat Red Hat Certified Specialist in OpenShift Administration exam Sample Questions (Q10-Q15):

                                      NEW QUESTION # 10
                                      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 # 11
                                      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

                                      Answer:

                                      Explanation:
                                      See the solution below in Explanation.
                                      Explanation:
                                      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


                                      NEW QUESTION # 12
                                      Create Service Account in QED
                                      Task information Details:
                                      Switch to project qed .
                                      Create service account project1-sa .
                                      Grant the anyuid SCC to that service account.

                                      Answer:

                                      Explanation:
                                      See the solution below in Explanation.
                                      Explanation:
                                      Solution:
                                      * Switch to the project:
                                      oc project qed
                                      * Create the service account:
                                      oc create serviceaccount project1-sa -n qed
                                      * Grant the SCC:
                                      oc adm policy add-scc-to-user anyuid -z project1-sa -n qed
                                      * Verify:
                                      oc get sa project1-sa -n qed
                                      oc adm policy who-can use scc anyuid
                                      Why this matters:
                                      * anyuid allows containers to run with arbitrary user IDs when an application requires it.
                                      * This is a common administrative task in OpenShift for third-party container images.
                                      This task validates service account creation and SCC assignment.


                                      NEW QUESTION # 13
                                      Create a PV and PVC
                                      Task information Details:
                                      Create a PersistentVolume named landing-pv with 1Gi , ReadOnlyMany , NFS backend, and Retain reclaim policy.
                                      Create a PersistentVolumeClaim named landing-pvc requesting 1Gi , ReadOnlyMany , and storage class nfs2 .

                                      Answer:

                                      Explanation:
                                      See the solution below in Explanation.
                                      Explanation:
                                      Solution:
                                      * Create landing-pv.yaml:
                                      apiVersion: v1
                                      kind: PersistentVolume
                                      metadata:
                                      name: landing-pv
                                      spec:
                                      capacity:
                                      storage: 1Gi
                                      accessModes:
                                      - ReadOnlyMany
                                      nfs:
                                      path: /open001
                                      server: 192.168.2.2
                                      persistentVolumeReclaimPolicy: Retain
                                      * Apply it:
                                      oc apply -f landing-pv.yaml
                                      * Create landing-pvc.yaml:
                                      apiVersion: v1
                                      kind: PersistentVolumeClaim
                                      metadata:
                                      name: landing-pvc
                                      spec:
                                      accessModes:
                                      - ReadOnlyMany
                                      resources:
                                      requests:
                                      storage: 1Gi
                                      storageClassName: nfs2
                                      * Apply it:
                                      oc apply -f landing-pvc.yaml
                                      * Verify:
                                      oc get pv
                                      oc get pvc
                                      oc describe pv landing-pv
                                      oc describe pvc landing-pvc
                                      This task validates persistent storage provisioning and claim binding concepts.


                                      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
                                      ......

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