VCP-DCV Configure and Manage vSphere Storage Practice Test 3 — 15 Questions

Question 1

A vSphere administrator configures a VVol datastore on a Pure Storage array. The administrator creates a storage policy with a custom tag. After attaching the policy to a VM, the VM remains uncompliant. What is the most likely cause?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

The storage array does not support the capability specified in the policy.. VVol storage policies rely on capabilities advertised by the array through VASA. If the array does not support the specific capability or tag used in the policy, the VM will be uncompliant. Option A is correct because the custom tag in the storage policy is not supported by the Pure Storage array. Option B is incorrect: VVol datastores require VASA certification; if the array were not VASA-compliant, it could not host a VVol datastore at all. Option C is incorrect because Storage DRS is unrelated to VVol policy compliance. Option D is incorrect because VVol datastores can use either iSCSI or NFS protocols, and the protocol does not affect compliance.

Answer

The storage array is not VASA-compliant.

Answer

The datastore cluster is not configured for Storage DRS.

Answer

The VVol datastore is using NFS protocol instead of iSCSI.

Question 2

Which TWO vSAN components are always created for every virtual disk object in a vSAN datastore? (Choose two.)

Accepted Answer

Metadata component. In vSAN, every virtual disk object is composed of at least one data component (replica), which stores the actual virtual machine disk data, so option E is always created. Alongside each data component, vSAN also creates a metadata component that holds the object's metadata and is required for the object to function, making option C always present. RAID-5 parity components (option A) only exist when the object uses RAID-5 erasure coding, which is not the default and not always created. A checksum component (option B) is not a standard vSAN object component type created for every virtual disk. A witness (option D) is only created when needed for certain configurations, such as when a policy requires a tie-breaker or when using RAID-1 with a secondary failure tolerance method, so it is not always present.

Answer

RAID-5 parity component

Answer

Checksum component

Answer

Witness

Question 3

Which THREE conditions must be met for Storage I/O Control (SIOC) to work effectively? (Choose three.)

Accepted Answer

The datastore must be VMFS5 or later.. Storage I/O Control (SIOC) requires a VMFS5 or later datastore because the per-VM I/O shares and latency-based throttling mechanisms depend on VMFS5's enhanced SCSI reservation and I/O statistics support, so option A is correct. Option C is correct because SIOC is configured and enforced through vCenter Server, which distributes the datastore-wide congestion thresholds and I/O share settings to all participating hosts. Option D is correct because SIOC only coordinates I/O across hosts that are members of the same vSphere cluster; hosts outside that cluster are not managed by the same vCenter cluster-level SIOC policy and can break the latency-based throttling. Option B is not required, since jumbo frames are a network tuning option for iSCSI/NFS throughput and are unrelated to SIOC's latency-based congestion detection. Option E is not required, as SIOC works with VMFS datastores regardless of whether they are backed by Fibre Channel, iSCSI, or FCoE, so limiting it to Fibre Channel only is incorrect.

Answer

Jumbo frames must be enabled on the storage network.

Answer

The datastore must be connected via Fibre Channel only.

Question 4

Which TWO statements are true about datastore heartbeating in vSphere HA? (Choose two.)

Accepted Answer

At least two datastores should be selected for heartbeating to provide redundancy.

Answer

Datastore heartbeating is enabled by default when vSphere HA is configured.

Answer

Datastore heartbeating is used to detect host isolation.

Answer

vSphere HA uses datastore heartbeating as the primary method for failure detection.

Question 5

Refer to the exhibit. What type of virtual disk is represented by this descriptor file?

Accepted Answer

Thick provisioned eager zeroed VMDK. A thick provisioned eager zeroed VMDK descriptor file shows the full allocated size with all blocks pre-zeroed at creation time, which is reflected in the descriptor's extent description and provisioning type. Eager zeroed disks are created with the -e (eagerzeroedthick) option and are required for clustering features like Microsoft Cluster Service (MSCS) and Fault Tolerance. The descriptor's metadata distinguishes it from lazy zeroed and thin provisioned variants.

Answer

Thin provisioned VMDK

Answer

Sparse disk with multiple extents

Answer

Physical mode RDM

Question 6

Refer to the exhibit. An administrator creates a storage policy with the rule: "Rule: provisioningType equals thick". When the policy is applied to a VM on this array, what will be the compliance status?

Accepted Answer

Not compliant - the array does not advertise thick provisioning capability.. The array only advertises thin provisioning and replication capabilities. The policy requires thick provisioning, which is not advertised. Therefore the VM will be marked as uncompliant because the array does not support the required capability. Option B is incorrect because it does not match; the array supports thin only. Option C is incorrect because VVols do not automatically default to thick. Option D is incorrect because the array does not provide thick.

Answer

Not compliant - the replication RPO is too high.

Answer

Compliant - the storage policy is applied regardless of capabilities.

Answer

Compliant - the array supports thin provisioning by default.

Question 7

A financial services company has a vSAN cluster composed of 4 hosts, each with 8 disk groups (1 SSD cache and 6 HDD capacity per group). The cluster runs a mix of VMs, including a critical trading application VM that requires low latency. The administrator notices that the trading VM experiences intermittent performance degradation during market hours. vSAN performance monitoring shows high I/O latency for the VM's objects. The storage policy for this VM is set to RAID-1 (Mirroring) with Primary Failures to Tolerate (PFTT)=1 and Object Space Reservation=100%. The cluster has a disk capacity of 80% used. The administrator also observes that the vSAN cluster is configured with a single fault domain. Which action should the administrator take to improve the trading VM's performance?

Accepted Answer

Reduce the number of disk groups per host to 2, using larger SSDs for cache, to reduce cache contention.. Reducing the number of disk groups per host from 8 to 2 with larger SSDs reduces cache contention and improves I/O latency for the trading VM. With 8 disk groups per host, the single SSD cache in each group is shared among 6 HDDs, and heavy mixed workloads can saturate cache, causing latency spikes. Consolidating to fewer, larger cache devices improves cache hit ratio and throughput.

Answer

Add two more hosts to the cluster and redistribute the disk groups.

Answer

Change the storage policy to PFTT=2 and Failure Tolerance Method=RAID-5/6 to reduce the number of replicas.

Answer

Enable deduplication and compression on the vSAN datastore to reduce capacity usage and I/O.

Question 8

A storage administrator is planning a vSAN stretched cluster for a remote office. The cluster must support stretching across two sites for disaster avoidance. Which two prerequisites must be met? (Choose two.)

Accepted Answer

The network latency between sites must be less than 5 ms round-trip.. Correct options A and C: Each site must have a minimum of two hosts (C) and network latency between sites must be less than 5 ms round-trip (A). Option B is incorrect because the witness host must be placed at a third site, not the primary. Option D is incorrect because hosts can use multiple network adapters for vSAN traffic; a single adapter is not required. Option E is incorrect because a vSAN stretched cluster typically uses two fault domains (one per site) plus a witness, not four.

Answer

The witness host must be placed at the primary site.

Answer

All hosts must be configured with a single network adapter for vSAN traffic.

Answer

A vSAN stretched cluster requires a minimum of four fault domains.

Question 9

A company uses vSphere 8 with a vSAN cluster consisting of 4 ESXi hosts. Each host has a single disk group with one 400 GB NVMe cache SSD and two 2 TB capacity SSDs. The vSAN cluster is used to host a mix of production VMs and test VMs. During peak business hours, the vSAN performance service shows high write latency (over 30 ms) for several production VMs, while test VMs are not affected. The administrator examines the vSAN performance charts and notices that the disk groups are not balanced: one disk group shows over 80% used capacity and high congestion, while the others are below 40%. The administrator wants to improve performance without adding new hardware or changing the storage policy. The vSAN health service reports no errors. Which action should the administrator take first?

Accepted Answer

Enable vSAN proactive rebalance.. vSAN proactive rebalance is the correct first action because it automatically detects and remediates disk group imbalance by moving components from overutilized disk groups to underutilized ones, directly addressing the congestion causing high write latency. It operates without adding hardware or changing storage policy, and is designed for exactly this scenario: uneven disk group utilization in a vSAN cluster. Since the health service reports no errors, proactive rebalance can safely rebalance components in the background, improving performance for the affected production VMs.

Answer

Manually evacuate data from the most utilized disk group.

Answer

Increase the number of disk groups on the busiest hosts.

Answer

Change the storage policy to use RAID-5 erasure coding to reduce capacity overhead.

Question 10

Which THREE of the following are true about vSphere Storage DRS?

Accepted Answer

Storage DRS can be configured with affinity rules.. Storage DRS can be configured with affinity rules to control which datastores a virtual machine's files should be placed on or kept together, ensuring performance or compliance requirements are met. This is a core feature that allows administrators to define VM-to-datastore affinity and anti-affinity rules within a datastore cluster.

Answer

Storage DRS always automatically migrates VMs.

Answer

Storage DRS works only with VMFS datastores.

Question 11

An administrator notices that a VMFS datastore has only one optimized path. The exhibit shows the output of esxcli storage nmp path list for that datastore. What should the administrator do to fully utilize both storage controllers?

Accepted Answer

Change the SATP to VMW_SATP_ALUA.. The exhibit shows only one optimized path because the storage array uses Asymmetric Logical Unit Access (ALUA), which requires the VMW_SATP_ALUA SATP to properly recognize and manage both active/optimized and active/non-optimized paths. With the default SATP (e.g., VMW_SATP_DEFAULT_AA), the host treats all paths as active but fails to distinguish optimized from non-optimized paths, often resulting in only one path being used. Changing to VMW_SATP_ALUA allows the host to correctly identify the optimized path and actively use both storage controllers for load balancing.

Answer

Rescan the storage adapters.

Answer

Change the PSP to Round Robin.

Answer

Enable the path failover policy.

Question 12

Refer to the exhibit. An administrator runs vmkfstools -Ph on a VSAN datastore. The output shows VMFS version 3.61 and a capacity of 2.0 TB. Which statement is true about this datastore?

Accepted Answer

The datastore is a vSAN datastore, and the VMFS version shown is for compatibility with VMFS tools.. The exhibit shows a VSAN datastore displayed as VMFS version 3.61. vSAN datastores are presented as VMFS version 3.61 to maintain compatibility with VMFS tools. The actual vSAN object store is not formatted with VMFS, but vmkfstools reports this version for compatibility.

Answer

The datastore is a VMFS datastore that has been upgraded to version 3.61.

Answer

The datastore is a Virtual Volumes datastore, which uses VMFS 3.61.

Answer

The datastore is an NFS datastore mounted as VMFS 3.61.

Question 13

Refer to the exhibit. An administrator configures Storage DRS for a datastore cluster. The cluster has datastores with varying performance. Which statement about Storage DRS behavior is correct?

Accepted Answer

Storage DRS will generate recommendations but will not perform migrations automatically.. Storage DRS in VMware vSphere can operate in manual mode, where it generates recommendations for migrations but does not automatically perform them. The exhibit likely shows the automation level set to Manual, so Storage DRS will only provide recommendations.

Answer

Storage DRS will automatically migrate VMs when utilization exceeds 80%.

Answer

Storage DRS will only balance based on space, ignoring I/O metrics.

Answer

Storage DRS will balance datastores every 8 hours regardless of thresholds.

Question 14

Refer to the exhibit. An administrator has configured a vSphere host to use Round Robin (RR) PSP for a specific ALUA storage device. However, after a storage array failover, the host is not detecting the new active paths correctly. Which configuration change should be made to ensure proper path failover behavior?

Accepted Answer

Enable explicit_transition by setting it to 1 in the SATP device config.. For ALUA (Asymmetric Logical Unit Access) arrays, the VMW_SATP_ALUA SATP must be told to honor SCSI explicit transitions so that when the array fails over, the host re-evaluates which paths are active/optimized. Setting `explicit_transition=1` in the SATP device configuration enables the host to issue REPORT TARGET PORT GROUPS and process the resulting state changes, allowing Round Robin to correctly select the new active paths.

Answer

Change the SATP to VMW_SATP_DEFAULT_AA.

Answer

Set the PSP to VMW_PSP_FIXED and designate a preferred path.

Answer

Increase the IOPS limit for the RR PSP to 10000.

Question 15

Refer to the exhibit. An administrator observes high latency on a VMFS datastore. Based on the vdbench and esxtop output, which component is most likely causing the latency?

Accepted Answer

The virtual machine or application is causing high latency due to inefficient I/O patterns.. The esxtop output shows KAVG (kernel latency) of 2.5 ms and GAVG (guest latency) of 8.2 ms. The total latency (QAVG) is 10.7 ms, but the reported datastore latency is 12 ms. The high GAVG relative to KAVG indicates latency at the guest/application level, not at the storage array. The vdbench test shows 12 ms average latency, which matches the guest-level latency. The issue is likely due to application I/O patterns or queue depth, not the storage backend.

Answer

The storage array is overloaded, causing high queue depth (DAQLEN=32).

Answer

The VMFS datastore is fragmented, causing increased seek times.

Answer

The ESXi host's HBA queue depth is insufficient, causing queuing on the host.