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RedHat EX280 Exam Syllabus Topics:

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

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                              RedHat Red Hat Certified Specialist in OpenShift Administration exam Sample Questions (Q17-Q22):

                              NEW QUESTION # 17
                              Configure quotas
                              Configure your OpenShift cluster to use quotas in the manhattan project with the following requirements:
                              The name of the ResourceQuota resource is: ex280-quota
                              The amount of memory consumed across all containers may not exceed 1Gi
                              The total amount of CPU usage consumed across all containers may not exceed
                              2 full cores
                              The maximum number of replication controllers does not exceed 3 The maximum number of pods does not exceed 3 The maximum number of services does not exceed 6

                              Answer:

                              Explanation:
                              See the solution below in Explanation.
                              Explanation:
                              Solution:
                              $ oc project manhattan
                              $ oc create quota ex280-quota -- hard=memory=1Gi,cpu=2,pods=3,services=6,replicationcontrollers=3
                              $ oc get resourcequota


                              NEW QUESTION # 18
                              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

                              Answer:

                              Explanation:
                              See the solution below in Explanation.
                              Explanation:
                              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


                              NEW QUESTION # 19
                              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 .

                              Answer:

                              Explanation:
                              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.


                              NEW QUESTION # 20
                              Configure project permissions
                              Configure your OpenShift cluster to meet the following requirements: The following projects exist:
                              apollo manhattan gemini bluebook titan
                              The user account armstrong is an administrator for project apollo and project gemini The user account wozniak can view project titan but not administer or delete it

                              Answer:

                              Explanation:
                              See the solution below in Explanation.
                              Explanation:
                              Solution:
                              $ oc new-project apollo
                              $ oc new-project manhattan
                              $ oc new-project gemini
                              $ oc new-project bluebook
                              $ oc new-project titan
                              $ oc adm policy add-role-to-user admin armstrong -n apollo
                              $ oc adm policy add-role-to-user admin armstrong -n gemini
                              $ oc adm policy add-role-to-user view wozniak -n titan


                              NEW QUESTION # 21
                              Deploy an application
                              Deploy the application called rocky in the bullwinkle project so that the following conditions are true:
                              The
                              application is reachable at the following address: http://rocky.apps.domainXX.example.com The application produces output

                              Answer:

                              Explanation:
                              See the solution below in Explanation.
                              Explanation:
                              Solution:
                              $ oc project bullwinkle
                              $ oc get pods
                              $ oc get all | grep deploy
                              $ oc get nodes
                              $ oc describe nodes | grep -i taint
                              $ oc adm taint nodes worker0 key1=value1:NoSchedule-
                              $ oc adm taint nodes worker1 key1=value1:NoSchedule-
                              $ oc describe nodes | grep -i taint
                              $ oc get route
                              $ oc delete route rocky
                              $ oc expose svc rocky --hostname rocky.apps.domainxx.example.com
                              $ oc get route


                              NEW QUESTION # 22
                              ......

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