EX316 sample questions

Question 1

You are the lead architect for a financial institution deploying Red Hat OpenShift Virtualization. You need to configure the cluster to support high-performance trading workloads that require overcommitted memory resources while maintaining strict CPU pinning for deterministic performance. Which configuration in the HyperConverged Custom Resource (CR) best achieves this balance?

Accepted Answer

Configure 'higherWorkloadDensity' in the HyperConverged CR's featureGates and apply a dedicated CPU placement policy on the VirtualMachine specs.

Answer

Enable the 'memoryOvercommit' feature gate and set the 'cpuFixed' ratio to 1:1 in the HyperConverged CR.

Answer

Set 'evictionStrategy: None' in the HyperConverged CR and use the 'guaranteed' QoS class for all VMs.

Answer

Modify the 'virt-handler' DaemonSet directly to pass Kubelet arguments for CPU manager policies.

Question 2

During a troubleshooting session, you observe that Virtual Machines are failing to start on a specific node. The `virt-handler` pod on that node is in a CrashLoopBackOff state. What is the primary role of the `virt-handler` component in the OpenShift Virtualization architecture?

Accepted Answer

It runs on every node to monitor the VM processes and communicate with libvirt to manage the VM lifecycle locally.

Answer

It acts as the cluster-wide controller that watches for VirtualMachine objects and creates corresponding pods.

Answer

It serves as the API entry point for all virtualization-related REST calls from the web console.

Answer

It provides the CNI plugin functionality specifically for connecting VMs to the pod network.

Question 3

You need to deploy the OpenShift Virtualization operator in a restricted network environment (air-gapped). Which of the following pre-requisite steps is absolutely critical before creating the Subscription object?

Accepted Answer

Mirror the operator images to a private registry and configure an ImageContentSourcePolicy (ICSP) or ImageDigestMirrorSet (IDMS).

Answer

Manually download the KubeVirt binaries and place them on all worker nodes.

Answer

Disable the Operator Lifecycle Manager (OLM) as it requires internet access to function.

Answer

Install the 'virtctl' binary on the bastion host used for deployment.

Question 4

A developer needs to access the text console of a Virtual Machine named `db-server` in the `prod-db` namespace to troubleshoot boot issues. The VM has no IP address assigned yet. Which command provides the most direct access to the serial console?

Accepted Answer

virtctl console db-server -n prod-db

Answer

oc exec -it db-server -n prod-db -- /bin/bash

Answer

virtctl vnc db-server -n prod-db

Answer

oc debug vm/db-server -n prod-db

Question 5

You are creating a new Virtual Machine and want to upload a local RHEL 9 QCOW2 image directly to a DataVolume as part of the provisioning process. Which `virtctl` command structure achieves this?

Accepted Answer

virtctl image-upload dv rhel9-dv --size=20Gi --image-path=rhel9.qcow2 --storage-class=ocs-storagecluster-ceph-rbd

Answer

virtctl create vm --image=rhel9.qcow2 --volume-size=20Gi

Answer

oc cp rhel9.qcow2 default/virt-launcher-pod:/var/lib/images/

Answer

virtctl upload-image --source=rhel9.qcow2 --target-pvc=rhel9-pvc

Question 6

You have a `VirtualMachine` resource named `web-01`. You notice there is also a `VirtualMachineInstance` object named `web-01`. You delete the `VirtualMachineInstance` object using `oc delete vmi web-01`. What is the expected outcome?

Accepted Answer

The VM stops running, and the VirtualMachine controller immediately restarts it because the `runStrategy` (or `running: true`) dictates it should be running.

Answer

The VM stops running and the VirtualMachine resource is also deleted automatically.

Answer

The VM stops running and remains stopped until manually started again.

Answer

The deletion fails because the VirtualMachine resource owns the VirtualMachineInstance.

Top vendors

Top exams

Free EX316 sample questions

During a troubleshooting session, you observe that Virtual Machines are failing to start on a specific node. The `virt-handler` pod on that node is in a CrashLoopBackOff state. What is the primary role of the `virt-handler` component in the OpenShift Virtualization architecture?

You need to deploy the OpenShift Virtualization operator in a restricted network environment (air-gapped). Which of the following pre-requisite steps is absolutely critical before creating the Subscription object?

A developer needs to access the text console of a Virtual Machine named `db-server` in the `prod-db` namespace to troubleshoot boot issues. The VM has no IP address assigned yet. Which command provides the most direct access to the serial console?

You are creating a new Virtual Machine and want to upload a local RHEL 9 QCOW2 image directly to a DataVolume as part of the provisioning process. Which `virtctl` command structure achieves this?

You have a `VirtualMachine` resource named `web-01`. You notice there is also a `VirtualMachineInstance` object named `web-01`. You delete the `VirtualMachineInstance` object using `oc delete vmi web-01`. What is the expected outcome?

6 more free samples are waiting