3V0-13.26 Sample Questions & Answers
Every question centers on watching over vSAN and other supported storage using VCF's own tools, then tracking down and fixing vSAN storage problems in a Cloud Foundation deployment.
Launch the full 3V0-13.26 simulator →Showing 6 of 12 free samples.
- Question 1Advanced
Troubleshoot and Optimize the VMware Solution · - Diagnose and resolve Supervisor and VKS cluster provisioning, connectivity, or namespace errors
A VCF environment has a vSphere Kubernetes Service (VKS) Supervisor Cluster configured across three zones. A developer reports that they cannot deploy a new Tanzu Kubernetes Grid (TKG) cluster. The error message is: '0/3 control plane nodes available'.
Which component should the support engineer investigate first to determine if the Supervisor Control Plane VMs are healthy?
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Correct answer: B
The vCenter Server 'Namespaces' (or Workload Management) summary page provides the direct health status of the Supervisor Cluster, including the status of the Control Plane VMs. If the control plane is unhealthy, new TKG clusters cannot be provisioned. Checking this summary is the most direct initial troubleshooting step.
- Question 2IntermediateSelect 2
Troubleshoot and Optimize the VMware Solution · - Given a scenario, troubleshoot VCF Operations infrastructure configuration issues
Select TWO common reasons why a VCF Operations Cloud Proxy might show as 'Offline' in the VCF Operations interface despite the VM being powered on and accessible via SSH.
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Correct answers: C, D
If the Cloud Proxy is not configured within the validity period of the OTP (usually 24 hours), the trust establishment fails, and it will appear offline or never connect.
The Cloud Proxy initiates the connection to the VCF Operations cluster (or SaaS endpoint). If outbound HTTPS (Port 443) is blocked by a firewall, the proxy cannot register or send heartbeats.
- Question 3Advanced
Troubleshoot and Optimize the VMware Solution · - Given a scenario, monitor VMware vSAN using tools in VCF
A critical database VM in a VCF Workload Domain is experiencing high I/O latency. The underlying storage is vSAN. The support engineer wants to determine if the latency is introduced at the VM kernel level or the physical disk level.
Which specific metric in the vSAN Performance Service should be analyzed to see the time spent in the ESXi storage stack versus the backend physical device?
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Correct answer: C
Comparing Frontend Latency (latency observed by the VM) with Backend Latency (latency at the disk group level) helps isolate the issue. High Backend Latency suggests physical disk contention or issues, while high Frontend Latency with low Backend Latency suggests queueing in the DOM owner or network layer.
- Question 4Beginner
Troubleshoot and Optimize the VMware Solution · - Given a scenario, troubleshoot an issue with an ESX host within a VCF Workload Domain
True or False: When troubleshooting an ESXi Host PSOD (Purple Screen of Death) in a VCF environment, the
vmk-zdumputility can be used to extract the log from a core dump partition even after the host has rebooted.Show answer & explanation
Correct answer: A
True. The
vmk-zdumputility is specifically designed to extract and analyze VMkernel core dumps that are saved to a diagnostic partition or file during a PSOD, allowing for post-reboot analysis. - Question 5Intermediate
Troubleshoot and Optimize the VMware Solution · - Given a scenario, monitor VCF Automation using VCF Operations
A VCF administrator notices that the 'VCF Automation' dashboard in VCF Operations is showing 'No Data' for the Service Broker metrics. The integration account test succeeds.
Which component is most likely responsible for collecting and forwarding these specific metrics to VCF Operations?
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Correct answer: B
VCF Operations relies on the VCF Automation Management Pack (Adapter) to query the Automation API and collect metrics. Even if the account test succeeds (authentication works), the adapter instance itself might be in a 'Warning' or 'Stopped' collection state, or the management pack version might be incompatible.
- Question 6Intermediate
Troubleshoot and Optimize the VMware Solution · - Given a scenario, troubleshoot common NSX infrastructure Issues
A company is using VCF 9.0 with NSX. An application team reports that VMs on the same segment on different hosts can communicate, but they cannot reach the physical network. The support engineer suspects an issue with the Edge Cluster.
Upon checking the Edge Transport Nodes, the engineer sees the TEP interface is down. Which specific network setting on the underlying ESXi host physical NICs (pNICs) is critical for Geneve tunnel traffic and could cause this if misconfigured?
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Correct answer: A
Geneve encapsulation adds overhead to packets. If the physical network (pNICs and switches) does not support a Jumbo Frame MTU (typically recommended 1600 or 1700+ bytes), TEP communication will fail for large packets, often causing tunnel instability or complete traffic loss for overlay networks.
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