VCP-DCV Configure and Manage vSphere Storage Practice Test 5 — 15 Questions

Question 1

A company is designing a vSphere environment for a critical database application. The storage array supports both Fibre Channel (FC) and iSCSI. The application requires low latency and high IOPS. Which storage protocol and path policy should be recommended?

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

Accepted Answer

FC with Round Robin path policy.. FC provides lower latency and higher IOPS than iSCSI due to dedicated hardware and lower protocol overhead, making it ideal for critical database workloads. The Round Robin path policy is recommended for FC with active-active storage arrays because it distributes I/O across all available paths, maximizing throughput and load balancing, which aligns with the requirement for high IOPS.

Answer

FC with Fixed path policy.

Answer

FC with Most Recently Used (MRU) path policy.

Answer

iSCSI with Round Robin path policy.

Question 2

Which storage feature in vSphere allows a VM to be migrated from one datastore to another without any downtime?

Accepted Answer

Storage vMotion. Storage vMotion is the correct answer because it enables live migration of a virtual machine's virtual disk files from one datastore to another with zero downtime. It uses a mirrored copy mechanism where the source and destination datastores are synchronized before the VM is switched to the destination, ensuring continuous VM availability.

Answer

vMotion

Answer

Distributed Resource Scheduler (DRS)

Answer

Storage DRS

Question 3

A vSphere administrator is observing that a VM with a 2 TB thin-provisioned virtual disk on a VMFS6 datastore is reporting 1.5 TB of used space inside the guest OS, but the datastore shows only 800 GB consumed by the VM. What is the most likely cause of this discrepancy?

Accepted Answer

The virtual disk is thin-provisioned, so only the actual written blocks consume space on the datastore.. The discrepancy is because the virtual disk is thin-provisioned. Thin provisioning means the virtual disk file (VMDK) on the datastore only occupies space for blocks that have been written to by the guest OS, not the full allocated size. The guest OS reports 1.5 TB of used space because it sees the logical file system usage, but the datastore only shows 800 GB consumed because that is the actual physical storage used by the written blocks.

Answer

The virtual disk needs to be defragmented to reclaim space.

Answer

The VM has a snapshot that is consolidating, reducing storage usage.

Answer

The virtual disk is thick-provisioned lazy zeroed, which delays allocation.

Question 4

A vSphere environment uses an iSCSI storage array with multiple targets. The administrator configures CHAP authentication but some hosts fail to connect. The working hosts are configured with mutual CHAP, while the failing hosts use only one-way CHAP. What is the most likely reason for the failures?

Accepted Answer

The storage array requires mutual CHAP, but the failing hosts are configured for one-way CHAP.. Mutual CHAP requires the target to authenticate the initiator and the initiator to authenticate the target. If the storage array is configured to require mutual CHAP, hosts using only one-way CHAP will fail to complete the authentication handshake. The working hosts are configured with mutual CHAP, confirming the array enforces mutual authentication.

Answer

The CHAP secret is not set on the failing hosts.

Answer

The iSCSI target name is incorrect on the failing hosts.

Answer

The storage array is configured to use only one-way CHAP.

Question 5

A company runs a critical SQL Server VM on vSphere 7.0. The VM has a single 300 GB virtual disk on a VMFS6 datastore backed by a SAN with 8 Gbps Fibre Channel. The VM is configured with 16 vCPUs and 64 GB RAM. Recently, users have reported slow query performance. The administrator checks the datastore performance and sees average latency of 15 ms with peaks of 50 ms during business hours. The storage array has multiple paths to the ESXi host, and the current path policy is Fixed with a single active path. The administrator wants to improve storage performance with minimal cost. Which action should the administrator take first?

Accepted Answer

Change the path selection policy to Round Robin on the ESXi host.. The current Fixed path policy with a single active path underutilizes the available storage bandwidth, causing high latency during peak I/O. Changing to Round Robin (RR) distributes I/O across all available paths, reducing queue depth on any single path and lowering latency without any hardware cost. This is the most immediate and cost-effective fix for the observed performance issue.

Answer

Add a vSphere Flash Read Cache to the VM.

Answer

Upgrade the Fibre Channel infrastructure to 16 Gbps.

Answer

Convert the virtual disk to thin provisioning to reduce I/O.

Question 6

A company uses vSphere 7.0 with two ESXi hosts in a cluster. All virtual machines (VMs) are stored on a VMFS6 datastore backed by a single LUN from a mid-range SAN. The LUN is presented to both hosts and both hosts have identical multipathing configuration. Recently, an administrator noticed that one host shows the datastore as "Inactive" while the other host can access it normally. The administrator verifies that both hosts have connectivity to the SAN, the LUN is visible to both hosts, and the storage array reports the LUN as online. The administrator wants to restore access to the datastore on the affected host without disrupting VMs running on the other host. Which action should the administrator take?

Accepted Answer

Perform a storage rescan on the affected host.. The datastore showing as 'Inactive' on one host while remaining accessible on the other indicates a path failure or a transient storage connectivity issue at the host level, not a permanent problem with the LUN or array. Performing a storage rescan on the affected host forces the ESXi host to re-evaluate all storage paths and re-register the datastore, restoring access without impacting VMs on the other host. This is the safest and least disruptive action because it does not require a reboot, multipathing policy change, or unmounting the datastore.

Answer

Reboot the affected ESXi host.

Answer

Change the multipathing policy on the affected host to Round Robin.

Answer

Unmount the datastore from the affected host and then remount it.

Question 7

Sequence the steps to configure a DRS rule that keeps two VMs on different hosts.

Accepted Answer

Access cluster configuration, then add a new DRS rule, then provide a name for the rule, then select 'Separate VMs' as the type, then assign the two VMs.. The correct sequence to configure a DRS rule that keeps two VMs on different hosts is: first access the cluster configuration, then add a new DRS rule, then name the rule, then choose the 'Separate VMs' type to enforce host separation, and finally assign the two VMs. This order ensures that each step logically follows the previous one, adhering to the typical workflow in vSphere where the rule is created before its properties are defined and applied.

Answer

Access cluster configuration, then add a new DRS rule, then select 'Separate VMs' as the type, then assign the two VMs, then provide a name for the rule.

Answer

Access cluster configuration, then provide a name for the rule, then add a new DRS rule, then select 'Separate VMs' as the type, then assign the two VMs.

Answer

Access cluster configuration, then add a new DRS rule, then assign the two VMs, then provide a name for the rule, then select 'Separate VMs' as the type.

Question 8

Place the steps to create a resource pool in a cluster.

Accepted Answer

Right-click cluster, select New Resource Pool, name the resource pool, set CPU and memory resources (shares, reservation, limit), configure expandable reservation (optional), click OK.. Creating a resource pool in a vSphere cluster involves first initiating the creation by right-clicking the cluster and selecting New Resource Pool, then providing a name, followed by configuring CPU and memory resources including shares, reservation, and limit, optionally enabling expandable reservation, and finally confirming by clicking OK. This sequence ensures all required parameters are set before finalizing the resource pool.

Answer

Right-click cluster, select New Resource Pool, set CPU and memory resources (shares, reservation, limit), name the resource pool, configure expandable reservation (optional), click OK.

Answer

Right-click cluster, select New Resource Pool, name the resource pool, set CPU and memory resources (shares, reservation, limit), click OK, configure expandable reservation (optional).

Answer

Right-click cluster, select New Resource Pool, name the resource pool, configure expandable reservation (optional), set CPU and memory resources (shares, reservation, limit), click OK.

Question 9

An administrator is configuring a vSAN cluster with all-flash capacity. The cluster uses RAID-5 erasure coding with a policy of 'Number of failures to tolerate = 1' (PFTT=1). The administrator wants to minimize storage overhead while ensuring availability. Which vSAN storage policy setting should be used?

Accepted Answer

Set 'Primary level of failures to tolerate' to 1 and 'Primary level of failures to tolerate method' to 'RAID-5 (Erasure Coding)'. For an all-flash vSAN cluster with PFTT=1, RAID-5 erasure coding provides the lowest storage overhead (approximately 1.33x) while still tolerating one failure. Setting the primary level of failures to tolerate to 1 and the method to RAID-5 (Erasure Coding) achieves the administrator's goal of minimizing overhead while maintaining availability.

Answer

Set 'Primary level of failures to tolerate' to 1 and 'Primary level of failures to tolerate method' to 'RAID-1 (Mirroring)'

Answer

Set 'Primary level of failures to tolerate' to 2 and 'Primary level of failures to tolerate method' to 'RAID-6 (Erasure Coding)'

Answer

Set 'Primary level of failures to tolerate' to 0

Question 10

A company is deploying a high-performance database workload on vSphere. The storage array supports NVMe over RDMA (NVMe-oF) and iSCSI. The workload requires extremely low latency and high IOPS. The network is dedicated 25 Gbps Ethernet with RoCE v2 support. Which storage protocol should be recommended, and why?

Accepted Answer

NVMe over RDMA, because it provides direct memory access and lower CPU overhead. NVMe over RDMA (NVMe-oF with RoCE v2) provides direct memory access between the host and storage target, bypassing much of the TCP/IP stack and dramatically reducing CPU overhead and latency. For a high-IOPS, low-latency database workload on a dedicated 25 Gbps RoCE-capable network, this is the optimal choice. It leverages the existing RDMA fabric to deliver near-local NVMe performance.

Answer

NFS, because it supports advanced features like Storage DRS

Answer

Fibre Channel, because it is the fastest protocol available

Answer

iSCSI, because it is simpler to configure and does not require RDMA support

Question 11

An ESXi host has an NFS datastore mounted from a NAS array. The administrator wants to enable hardware acceleration (VAAI) for the datastore. Which requirement must be met?

Accepted Answer

The NAS array must support NFSv3 and VAAI primitives. VAAI (vStorage APIs for Array Integration) for NFS requires the NAS array to support NFSv3 and the specific VAAI primitives for NFS, such as Full File Clone, Fast File Clone, Reserve Space, and Extended Statistics. ESXi detects these primitives via the array's NFSv3 protocol extensions and enables hardware acceleration for operations like clone and snapshot. Without array support for these primitives, VAAI cannot be enabled.

Answer

The NAS array must present the LUN as an iSCSI target

Answer

The datastore must be formatted as VMFS6

Answer

The ESXi host must have a software FCoE adapter configured

Question 12

An ESXi host is connected to an iSCSI storage array using software iSCSI initiator. The administrator has configured two NICs for iSCSI traffic. During setup, the administrator selects 'Round Robin' as the path policy for the storage device. What is the benefit of this path policy?

Accepted Answer

It load balances I/O across all active paths. Round Robin is a VMware PSA (Pluggable Storage Architecture) path selection policy that actively distributes I/O across all active paths to a given device in a rotating fashion. With two iSCSI NICs configured, Round Robin sends commands down both paths, increasing aggregate throughput and utilizing both NICs simultaneously. This is the defining benefit of Round Robin compared to failover-only policies.

Answer

It uses a single path until failure, then switches to another

Answer

It minimizes latency by always using the path with lowest latency

Answer

It provides the highest performance for all workloads

Question 13

Which THREE components are required to configure Storage DRS affinity and anti-affinity rules?

Accepted Answer

Datastores. Storage DRS affinity and anti-affinity rules are configured at the datastore-cluster level, so option E (a datastore cluster) is required because it provides the boundary within which the rules are defined and enforced. Option B (datastores) is correct because the rules themselves specify which datastores within that cluster the virtual machines should be kept together on (affinity) or kept apart from (anti-affinity). Option D (virtual machines) is correct because the rules are applied to VM-to-datastore relationships, meaning the VMs are the objects whose placement is being constrained. Option A (a resource pool) is not required, since resource pools govern CPU and memory allocation, not datastore placement. Option C (an ESXi host) is not required as a rule component, because Storage DRS rules operate on datastores and VMs within a datastore cluster rather than being defined per host.

Answer

A resource pool

Answer

An ESXi host

Question 14

What is the maximum number of paths that vSphere supports for a single storage device?

Accepted Answer

32. vSphere supports up to 32 paths per storage device. 4 paths is common for some arrays, 8 is typical but not the maximum, and 256 is too high.

Answer

8

Answer

256

Answer

4

Question 15

An administrator notices that a VM with high I/O demands is experiencing performance issues because other VMs on the same datastore are consuming too many I/O operations. Which feature can be used to guarantee a minimum I/O share to this VM?

Accepted Answer

Storage I/O Control shares. Storage I/O Control shares allow you to guarantee a minimum I/O share to a VM by assigning shares to its virtual disks. When contention occurs, ESXi enforces these shares to ensure the VM gets its fair share of I/O resources.

Answer

Multipathing policy

Answer

VM storage policy

Answer

Storage DRS