Advanced VMware Cloud Foundation 9.0 Storage - 3V0-23.25 Exam Practice Test

Question 1

A storage architect has been called into a meeting with the accounting team who is trying to determine why
20% of their raw capacity is not available for consumption. Their vSAN cluster was created with the following characteristics:
* 2 x 2 TB NVMe disks in 6 hosts in their vSAN cluster.
* FTT=1, RAID-1 for the default policy.
* Host Rebuild Reserve not activated for this cluster.
Which two items should the Architect say accounts for most of the unusable capacity? (Choose two.)

A. VM swap overhead

B. RAID Overhead

C. Operational Reserve (policy changes, rebalancing, data movement)

D. Encryption overhead

E. Host upgrade overhead

Correct Answer: B,C

Question 2

An enterprise is planning to deploy a new vSAN ESA enabled cluster to their existing VMware Cloud Foundation (VCF) Private Cloud Workload Domain. The following requirements have been given:
* 2 x 4 TB NVMe disks per host
* FTT=1/RAID-5 for all deployed Virtual Machines
* Expected dedupe/compression ratio = 1.5 (50%)
* Reserve enough capacity to rebuild a host completely in case of a failure (Host Rebuild Reservation)
* Operational Reserve of 10%
* Expected overhead for filesystem, object, etc. of 25%
How many hosts are required to meet a minimum usable capacity of 12 TB?

A. 4 hosts

B. 3 hosts

C. 5 hosts

D. 6 hosts

Correct Answer: A

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Question 3

An administrator is tasked with replacing the existing Witness Host for a 2-node vSAN Edge Cluster.
During the replacement procedure, the new Witness Host does not appear as an available selection.
What is the cause of this configuration issue?

A. The witness host resides in the 2-node vSAN enabled cluster.

B. The VMkernel adapter is configured with vSAN traffic enabled.

C. The VMkernel adapter is connected to all hosts in the Stretched cluster.

D. The witness host is already assigned to another 2-node vSAN cluster.

Correct Answer: A

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Question 4

An administrator has deployed a three-host vSphere cluster with a small amount of VMFS storage and wants to add additional capacity from a vSAN ESA cluster located in the same vCenter Server.
When the administrator selects the vSphere cluster and navigates to the Configure tab, the Datastore Management option is missing under the vSAN section.
What prerequisite must be met before the administrator can mount the remote datastore?

A. A fourth host must be commissioned for the vSphere cluster.

B. The vSAN Storage cluster must have a minimum of 80% free space.

C. The vSphere cluster must be deployed to a different VCF Workload Domain.

D. vSAN must be enabled on the non-vSAN cluster to act as a compute cluster.

Correct Answer: D

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Question 5

An administrator is monitoring a vSAN ESA backed workload domain that is dedicated for running AI inferencing. When the administrator navigates to the Storage Performance dashboard in VMware Cloud Foundation Operations, the performance dashboard shows:
* High backend write latency ( > 8 ms)
* Low read latency ( < 1 ms)
* Normal network throughput
* Disk Group Health = Green
Based on the readings above, what would be the explanation?

A. The workload's small-block writes are compressed inline, lowering backend throughput and increasing cache misses.

B. A wrongly sized read cache tier is throttling the write buffer, thus forcing the reads to trespass to the capacity tier.

C. A vSAN network congestion event on the vSAN TCP port 2233 is throttling mirror acknowledgements.

D. This is caused due to transient commit-queue delays, since the workload is exhibiting random-writes saturating ESA's write buffer.

Correct Answer: D

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Question 6

An administrator is working on a VMware Cloud Foundation (VCF) Workload Domain that was configured to use vSAN for principal storage. The administrator wishes to create and configure a datastore cluster to host tenant VMs using that vSAN backed storage across multiple clusters, mixed OSA and ESA, in the domain.
What should the administrator consider?

A. A datastore cluster can combine different storage types, such as vSAN, FC, and NFS datastores, as long as they are in the same vCenter; Storage DRS will treat them uniformly.

B. When using vSAN datastores, Datastore Clusters are not supported. Each VM must be placed manually on the vSAN datastore.

C. vSAN OSA and ESA based datastores must be added to a datastore cluster tag and then selected as part of a single storage policy.

D. When using vSAN as the underlying datastore, an administrator must create the datastore cluster via vCenter APIs, include the vSAN datastore(s) in it, enable Storage DRS, and ensure the VM Storage Policies reference the appropriate vSAN-capable datastore.

Correct Answer: B

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Question 7

A six-node vSAN ESA cluster contains multiple Virtual Machines (VMs), and a vSAN storage policy with the rule "Failures to tolerate" set to "1 failure - RAID-5 (Erasure Coding)" is assigned. A vSAN administrator has changed the rule in the assigned policy to "2 failures - RAID-6 (Erasure Coding)." What is the result of this change?

A. The policy change is rejected immediately.

B. The updated policy is serially applied to the Virtual Machines.

C. The changes are queued for 60 minutes.

D. No changes occur until the policy is reapplied.

Correct Answer: D

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Question 8

A customer attaches an external Fibre Channel (FC) VMFS datastore to a VMware Cloud Foundation (VCF) workload domain for backup staging. The administrator must confirm that the datastore is visible to all hosts, and that path and device health alarms will trigger should a fabric link or path fail.
Which action should the administrator take to verify this?

A. In vCenter verify the external VMFS datastore connectivity, paths and multipath health.

B. Execute storage.monitor.getStatus via VCF SDK to receive a consolidated health summary of all VMFS, vSAN and NFS datastores.

C. Run esxcli vsan storage list on each host to view VMFS datastore path status.

D. Use esxcli fc adapter list followed by vmkfstools --inspectpaths to validate health for the VMFS LUN.

Correct Answer: A

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VMware Advanced VMware Cloud Foundation 9.0 Storage - 3V0-23.25 Exam Practice Test

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