VCP-DCV Practice Test 21 — 15 Questions

Question 1

A vSphere administrator needs to ensure that vCenter Server can authenticate users against an Active Directory over LDAP identity source. The environment uses vCenter Server 7.0. Which two configurations are required to successfully add the identity source? (Choose two.)

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

Accepted Answer

Provide the bind user's credentials with sufficient privileges to read the directory.. To add an Active Directory over LDAP identity source in vCenter Server 7.0, you must provide the base DN for searches and a bind user with read access. These allow vCenter Server to query the directory for authentication. IWA is a different identity source type, FIPS mode is unrelated, and a trusted CA certificate is only needed if using LDAPS, which is not specified here.

Answer

Upload a trusted root CA certificate for the LDAP server's SSL certificate.

Answer

Configure the identity source to use Integrated Windows Authentication (IWA).

Answer

Enable FIPS mode on vCenter Server before adding the identity source.

Question 2

A vSphere administrator is deploying a new cluster of hosts that will run virtual desktop workloads. The administrator wants to reduce memory overcommitment pressure while keeping consolidation ratios reasonable. Which vSphere feature allows the host to reclaim memory by sharing identical memory pages across virtual machines?

Accepted Answer

Transparent Page Sharing (TPS). Transparent Page Sharing deduplicates identical memory pages across virtual machines, shrinking the host's memory footprint. For VDI clusters running many similar desktops, this directly reduces overcommitment pressure and supports higher consolidation ratios. The other mechanisms reclaim memory through guest pressure, swapping, or compression rather than sharing identical pages.

Answer

Hypervisor swap

Answer

Memory compression

Answer

Memory ballooning

Question 3

An administrator is troubleshooting a VM that reports poor application responsiveness. In esxtop on the ESXi host, the VM shows a CPU ready time (READY) of 12 percent, and the host has more vCPUs assigned to running VMs than physical cores. Which factor is the PRIMARY contributor to this ready time?

Accepted Answer

The VM is waiting for a physical CPU to become available because the host is overcommitted and the scheduler cannot place it immediately.. CPU ready time reflects how long a vCPU waits for a physical core. With more vCPUs assigned than physical cores, the ESXi scheduler must time-slice, producing ready time. Reducing vCPU counts, adding hosts, or using shares and reservations to prioritize the latency-sensitive VM are the appropriate remedies for this contention.

Answer

The physical CPU cores are running below their rated clock speed, so each vCPU takes longer to execute.

Answer

The VM's memory reservation is too low, causing the vCPU to stall while pages are faulted from disk.

Answer

The guest operating system is running too many background services, which inflates the ready time reported by esxtop.

Question 4

A vSphere administrator is evaluating the performance of a new cluster. The administrator notices that the CPU ready time for a particular VM is consistently above 10%. The host has 24 physical cores and is running 30 VMs, each with 2 vCPUs. Which action would most directly reduce the CPU ready time for this VM?

Accepted Answer

Migrate the VM to a host with fewer VMs using vMotion.. High CPU ready time means the VM is waiting for physical CPU resources. The most direct way to reduce it is to decrease contention on the host. Migrating the VM to a host with fewer VMs via vMotion reduces the number of vCPUs competing for physical cores, allowing the scheduler to allocate CPU time more quickly. Other options either increase demand or do not address the root cause.

Answer

Enable CPU affinity for the VM to pin it to specific cores.

Answer

Increase the CPU shares of the VM to High.

Answer

Increase the number of vCPUs assigned to the VM.

Question 5

A vSphere administrator is scaling a cluster that runs a latency-sensitive trading application. The application VMs must consistently receive CPU time with minimal scheduling delay, while other workloads on the same hosts must still run. Which TWO configurations should the administrator apply to the trading VMs to reduce CPU scheduling delay? (Choose two.)

Accepted Answer

Assign a high CPU shares value to the trading VMs relative to other VMs.. CPU reservations guarantee minimum MHz and CPU shares establish relative priority during contention; together they reduce ready time for latency-sensitive VMs. Limits and lower shares restrict or deprioritize workloads, and disabling hyperthreading reduces schedulable capacity. Applying reservations and elevated shares targets the scheduling delay directly.

Answer

Move the trading VMs into a resource pool with a lower CPU share value than the default.

Answer

Set a CPU limit on the trading VMs to cap their maximum usage.

Answer

Disable hyperthreading on the hosts to ensure each vCPU maps to a full physical core.

Question 6

A vSphere administrator is designing a new cluster for a workload that requires high memory bandwidth and low latency. The physical hosts have 512 GB of RAM each, and the VMs are expected to have large memory footprints. The administrator wants to ensure that memory overcommitment is minimized and that VM memory is backed by physical RAM as much as possible. Which configuration should be applied to the VMs to achieve this?

Accepted Answer

Set a memory reservation equal to the configured memory size for each VM.. Setting a memory reservation equal to the VM's configured memory size ensures that all of the VM's memory is backed by physical RAM, preventing overcommitment and guaranteeing low-latency memory access. This is the most direct way to meet the requirement for high memory bandwidth and minimal overcommitment.

Answer

Configure the VM to use large memory pages and set a memory reservation of 50% of the configured memory.

Answer

Set a memory limit equal to the configured memory size and enable memory ballooning.

Answer

Enable memory compression and set a memory limit equal to the configured memory size.

Question 7

An administrator is configuring storage performance for a vSphere cluster that runs a mix of I/O-intensive databases and general-purpose VMs. The storage array is capable of providing high IOPS, but the administrator wants to ensure that the database VMs receive preferential treatment during periods of storage contention. The administrator has created a datastore cluster and enabled Storage DRS. Which additional configuration should be applied to meet this requirement?

Accepted Answer

Enable Storage I/O Control on the datastore cluster and set shares on the database VMs' virtual disks.. Storage I/O Control (SIOC) is the correct solution because it enables per-virtual-disk share-based prioritization when a datastore becomes congested. By assigning higher shares to database VMs, they receive a larger portion of I/O resources during contention, ensuring preferential treatment without isolating storage or resorting to limits.

Answer

Create a separate datastore for the database VMs and place it on a dedicated LUN.

Answer

Configure Storage DRS to use the 'I/O latency' threshold and set it to a low value.

Answer

Set a storage limit on the general-purpose VMs to restrict their I/O usage.

Question 8

An administrator is planning a new vSphere deployment and wants to use a storage architecture that presents file-level storage over the network, supports VMware vStorage APIs for Array Integration (VAAI) primitives, and allows multiple ESXi hosts to access the same datastore concurrently. Which storage type best matches these requirements?

Accepted Answer

NFS 3.1 datastore. NFS is the file-level network storage protocol in vSphere. NFS 3.1 datastores support VAAI primitives and can be mounted by multiple ESXi hosts simultaneously, enabling shared storage for HA and vMotion. Fibre Channel and iSCSI are block-level, and vVols is an array-integration framework, so NFS best matches the requirements.

Answer

iSCSI software adapter LUN

Answer

VMFS on a Fibre Channel LUN

Answer

Virtual Volumes (vVols) on NFS

Question 9

A vSphere administrator is troubleshooting intermittent performance degradation on a production VM. The VM resides on a datastore backed by a storage array that is also serving several other clusters. The administrator needs to determine whether the latency is caused by the storage array or by the ESXi host's storage stack. Which esxtop metric should be compared to the array's reported latency to make this determination?

Accepted Answer

DAVG (device average latency) in the device view of esxtop. The device view of esxtop provides DAVG, which is the average latency of I/O operations as seen by the ESXi host. By comparing DAVG with the storage array's own latency statistics, an administrator can determine whether the bottleneck is within the host's storage stack or the array itself. This is a standard method for isolating storage performance issues in vSphere.

Answer

GAVG (guest average latency) in the virtual machine view of esxtop

Answer

QAVG (queue average latency) in the virtual machine view of esxtop

Answer

KAVG (kernel average latency) in the device view of esxtop

Question 10

An administrator is configuring role-based access control in vCenter Server 7.0. A new security policy requires that users can only view the inventory and cannot perform any changes. The administrator creates a custom role with only read-only privileges. Which two actions must the administrator take to ensure the role is effective for a group of users? (Choose two.)

Accepted Answer

Ensure the users are members of an Active Directory group that is added to vCenter Single Sign-On as a group.. To grant a group of users read-only access to the entire vCenter inventory, the administrator must first ensure the group is known to vCenter Single Sign-On, typically by adding the Active Directory group as an SSO group. Then, the read-only role should be assigned to that group at the root folder with 'Propagate to children' enabled. This ensures all group members inherit view-only permissions on all current and future objects. Individual assignments or overly permissive roles do not meet the requirement efficiently or securely.

Answer

Grant the users the 'Administrator' role at the root folder to ensure they can see all objects.

Answer

Set the users' login to use a read-only mode in the vSphere Client.

Answer

Assign the role to the users on each individual VM and host object.

Question 11

An administrator is using vSphere Lifecycle Manager (vLCM) to manage a cluster with an image. During remediation, the task fails with the error: 'Cannot remediate host because it is not compliant with the image.' The administrator checks the image and sees that it includes a firmware add-on. The hosts are from different hardware vendors. What is the most likely cause of the failure?

Accepted Answer

The firmware add-on is not compatible with all host models in the cluster.. Firmware add-ons in vLCM are specific to hardware vendors and models. When a cluster contains hosts from different vendors, a single firmware add-on cannot apply to all hosts. vLCM will mark hosts that are incompatible with the add-on as non-compliant, causing remediation to fail. The administrator should either use separate clusters per hardware type or remove the firmware add-on and manage firmware separately.

Answer

The hosts do not have enough free disk space to stage the firmware update.

Answer

The ESXi base image version is too old for the firmware add-on.

Answer

The vLCM depot is not synchronized with the latest firmware packages.

Question 12

An administrator is using vSphere Lifecycle Manager (vLCM) to manage a vSphere 8 cluster. The cluster's desired image includes a specific ESXi base image and an OEM add-on. During remediation, the administrator wants to minimize the impact on running workloads. Which vLCM feature should be configured to control the number of hosts remediated in parallel?

Accepted Answer

Remediation parallelization. Remediation parallelization in vLCM lets administrators specify the maximum number of hosts that can be remediated simultaneously. This directly controls the impact on cluster capacity and workload performance during updates. The other options are related to resource management but do not set the concurrency level for remediation.

Answer

vSphere High Availability (HA) admission control

Answer

Host remediation timeout

Answer

Distributed Resource Scheduler (DRS) automation level

Question 13

A retail company's vSphere 8 environment uses vCenter Single Sign-On (SSO) with an external identity provider via SAML. The security team wants to enforce multi-factor authentication (MFA) for all administrators logging into vCenter Server. Which SSO configuration should the administrator implement?

Accepted Answer

Configure the identity provider to require MFA and set the vCenter SSO to use the external identity provider as the authentication source.. To enforce MFA for vCenter administrators, the most effective method is to delegate authentication to an external identity provider that already enforces MFA. When vCenter SSO is configured to use that provider via SAML, MFA becomes mandatory for all logins. Other options either do not provide MFA or are not aligned with the existing SAML integration.

Answer

Configure vCenter SSO to use Integrated Windows Authentication (IWA) and enable Kerberos pre-authentication.

Answer

Enable Smart Card Authentication in vCenter SSO and require administrators to use smart cards.

Answer

Set the vCenter SSO password policy to require complex passwords and frequent changes.

Question 14

An administrator is configuring a vSphere Distributed Switch (vDS) with multiple uplinks. The administrator wants to ensure that a single virtual machine's traffic uses only one physical uplink at a time to avoid out-of-order packet delivery. Which vDS teaming policy should the administrator select?

Accepted Answer

Route based on originating virtual port ID. Route based on originating virtual port ID pins each virtual machine's traffic to a single uplink, ensuring that packets from that VM are not spread across multiple uplinks and thus avoiding out-of-order delivery. IP hash and physical NIC load can distribute a VM's flows across uplinks, and explicit failover order does not provide per-VM distribution.

Answer

Use explicit failover order

Answer

Route based on IP hash

Answer

Route based on physical NIC load

Question 15

A vSphere administrator needs to migrate a virtual machine from one ESXi host to another while the virtual machine remains powered on. The virtual machine has a single vNIC connected to a standard switch port group named 'Production'. The destination host is in the same cluster and has a standard switch with a port group named 'Production' but with different VLAN settings. What will happen if the administrator attempts a vMotion migration?

Accepted Answer

The vMotion migration will succeed, and the virtual machine will use the VLAN settings of the destination port group.. During a vMotion migration, the virtual machine's network adapter is reconnected to a port group on the destination host that has the same name as the source port group. The VLAN settings of the destination port group are applied, not the source. This means that if VLAN settings differ, the virtual machine will use the destination's VLAN after migration. The migration itself will succeed as long as the port group name exists, regardless of VLAN differences.

Answer

The vMotion migration will fail because the VLAN settings are different.

Answer

The vMotion migration will fail because the port group names do not match exactly.

Answer

The vMotion migration will succeed, and the virtual machine will continue to use the VLAN settings of the source port group.