VCP-DCV Practice Test 16 — 15 Questions

Question 1

Based on the exhibit, which VM (indicated by the row) is most likely experiencing severe CPU scheduling contention?

Accepted Answer

The VM with %RDY = 30.0. The row with the highest %RDY (30.0) indicates the VM is spending a large percentage of time ready to run but not being scheduled, which is a sign of severe CPU contention. The other rows have lower %RDY values.

Answer

The VM with %RDY = 2.3

Answer

The VM with %RDY = 15.5

Answer

The VM with %RDY = 0.5

Question 2

An organization wants to migrate a VM from one vCenter Server to another without shutting down the VM. Both vCenter Servers are in Enhanced Linked Mode. Which migration method should the administrator use?

Accepted Answer

Cross-vCenter vMotion. Cross-vCenter vMotion (option B) is the correct method because it allows a live, zero-downtime migration of a running VM between vCenter Server instances, even when both are in Enhanced Linked Mode. This feature uses the vMotion protocol to transfer memory and execution state across vCenter boundaries without requiring shared storage, as long as the source and destination hosts are in the same vCenter Single Sign-On domain and meet compatibility requirements.

Answer

Cold migration

Answer

Storage vMotion

Answer

Export the VM as OVF and import it to the other vCenter

Question 3

An ESXi host experiences high memory ballooning in virtual machines. The administrator checks the host's memory metrics and sees a high swap rate. The host has 512 GB of memory, and the VMs are configured with memory reservations. Which configuration is most likely contributing to the excessive swapping?

Accepted Answer

Memory overcommitment is high, and some VMs have large memory reservations.. High memory overcommitment combined with large VM memory reservations forces ESXi to reclaim memory from unreserved VMs via ballooning and, when that is insufficient, host-level swapping. Reservations lock physical memory for some VMs, leaving less for others, which amplifies ballooning and swap activity on the overcommitted host. The correct fix is to reduce overcommitment or right-size reservations.

Answer

Memory shares are set too low for the VMs experiencing ballooning.

Answer

The host is configured for NUMA interleaving, causing memory access delays.

Answer

Transparent Page Sharing (TPS) is enabled and is aggressively sharing memory pages.

Question 4

An administrator wants to stage updates to reduce downtime during remediation of a vLCM-managed cluster. What should they configure?

Accepted Answer

Enable 'Stage remediation' in the cluster image configuration.. vLCM's 'Stage remediation' option pre-downloads and stages the update payload on each host before remediation begins, so the actual remediation step only needs to apply the staged bits and reboot. This shortens the per-host maintenance window and reduces the risk of remediation failing due to download issues during the change window.

Answer

Enable 'Quick Boot' to speed up reboots.

Answer

Configure the cluster to use a rolling schedule.

Answer

Create multiple host images for each host.

Question 5

Refer to the exhibit. An administrator increased the MaxQueueDepth parameter for an NFS 4.1 datastore. Which effect does this change have on performance?

Accepted Answer

It increases throughput by allowing more concurrent I/O operations.. MaxQueueDepth on an NFS 4.1 datastore controls the maximum number of outstanding I/O operations that can be queued to the NFS server. Increasing this value allows more concurrent I/O requests to be in flight, which can improve throughput by keeping the storage pipeline fuller and reducing idle time waiting for responses. This is especially beneficial for workloads with many parallel I/O streams, as it enables better utilization of network and storage resources.

Answer

It reduces latency by limiting the number of queued I/Os.

Answer

It limits the maximum size of read and write operations.

Answer

It has no effect because NFS 4.1 does not support queue depth adjustments.

Question 6

A vSphere cluster with DRS enabled is experiencing an imbalance in resource utilization across hosts. DRS is set to 'Manual' mode. What action should the administrator take to resolve the imbalance?

Accepted Answer

Manually migrate VMs using vMotion.. In DRS Manual mode, vSphere generates migration recommendations but does not execute them automatically. The administrator must manually apply the recommended vMotion migrations to rebalance the cluster. Changing to Fully Automated would automate future balancing but does not immediately resolve the current imbalance without manual intervention.

Answer

Change DRS to 'Fully Automated' mode.

Answer

Enable HA admission control.

Answer

Increase the DRS migration threshold.

Question 7

A company has a cluster of 4 ESXi hosts. They want to ensure that virtual machines are automatically distributed evenly across hosts based on CPU and memory load. Which feature should be enabled on the cluster?

Accepted Answer

vSphere DRS. DRS (Distributed Resource Scheduler) automatically balances VM loads based on resource usage. HA provides high availability, FT provides fault tolerance, and DPM manages host power.

Answer

vSphere HA

Answer

Fault Tolerance

Answer

Distributed Power Management

Question 8

An administrator attempts to export a vLCM image but gets an error: 'Export image operation is not supported for this image'. What could be the reason?

Accepted Answer

The image contains a custom component.. vLCM image export is only supported for images composed entirely of components available in the VMware depot (base image plus standard add-ons). When an image includes a custom component — for example, an OEM or third-party VIB added outside the standard depot — vCenter cannot serialize that image for export, so it returns 'Export image operation is not supported for this image'. Removing the custom component or rebuilding the image from depot-only components resolves the error.

Answer

The vLCM database is corrupt.

Answer

The image is too large.

Answer

The vCenter version does not support export.

Question 9

A company runs a critical application on a VM with 16 vCPUs and 128 GB RAM on an ESXi host that has 2 sockets (12 cores per socket, hyperthreading enabled) and 512 GB RAM. The application is known to scale well with multiple threads and memory bandwidth. Recently, a DRS migration moved the VM to a different host with the same CPU and memory configuration. After the migration, the application's performance dropped by 30%. The administrator checks vCenter and finds no other VMs on the destination host. esxtop shows the VM's CPU ready time is less than 1%, but the 'CPU cost' metric is high, and the 'Memory' section shows high values for 'Remote' memory accesses. What is the most likely cause of the performance drop?

Accepted Answer

The VM is spanning multiple NUMA nodes, causing remote memory access.. The VM has 16 vCPUs and 128 GB RAM. On a host with 2 sockets, each socket has 12 cores (24 logical processors with hyperthreading). A 16-vCPU VM cannot fit within a single NUMA node (which typically corresponds to a physical socket, with 12 cores/24 threads). Therefore, the VM spans both NUMA nodes. When a VM spans NUMA nodes, memory accesses from a vCPU on one node to memory on the other node become remote, increasing latency and reducing effective memory bandwidth. The esxtop output confirms this: low CPU ready (<1%) rules out CPU contention, but high 'CPU cost' and high 'Remote' memory accesses indicate NUMA remote memory access. This explains the 30% performance drop, especially for a memory-bandwidth-sensitive application.

Answer

The VM's virtual hardware version is not compatible with NUMA.

Answer

The VM's memory shares have been reduced after the migration.

Answer

Transparent Huge Pages are not enabled on the destination host.

Question 10

A company wants to integrate vCenter Server with an external identity source to allow users to authenticate using their corporate credentials. The administrator must ensure that authentication traffic is encrypted. Which solution should the administrator implement?

Accepted Answer

Active Directory over LDAPS. Active Directory over LDAPS uses LDAP over SSL/TLS, which encrypts authentication traffic between vCenter Server and the AD domain controller. This meets the requirement for encrypted authentication. LDAPS typically uses port 636 and requires proper certificates on the domain controllers. This is the correct solution for integrating vCenter with an external identity source while ensuring encryption.

Answer

Local OS authentication on vCenter Server

Answer

Active Directory over NTLM

Answer

Active Directory over LDAP

Question 11

A VM on a vSphere Distributed Switch is experiencing intermittent connectivity drops. The administrator checks the vDS health check and sees no errors. The physical switch logs show no issues. The VM is on a port group with VLAN 200. The administrator runs a ping from the VM to the gateway and notices packet loss. What should the administrator investigate next?

Accepted Answer

Review the NIC teaming failover order and ensure active uplinks are up.. Intermittent connectivity drops on a VM connected to a vDS, despite no errors on the vDS health check or physical switch logs, often point to a NIC teaming misconfiguration. If the active uplinks are not properly set or one uplink is down, the VM traffic may fail over to a standby or unused uplink, causing packet loss. Verifying the teaming failover order and ensuring all active uplinks are operational directly addresses this common cause of intermittent drops.

Answer

Verify the VMkernel port configuration

Answer

Check the VM's firewall settings

Answer

Check DNS resolution for the gateway

Question 12

A vSphere administrator needs to ensure that a critical VM restarts automatically if the ESXi host fails. Which feature should be configured?

Accepted Answer

vSphere HA. vSphere HA (High Availability) is specifically designed to automatically restart VMs on another host in the cluster if the original ESXi host fails. It monitors host and VM health and provides rapid recovery without manual intervention. This directly meets the requirement for automatic restart after host failure.

Answer

vSphere vMotion

Answer

vSphere DRS

Answer

vSphere Fault Tolerance

Question 13

A vLCM image is configured, but remediation fails with error: 'Image compliance check failed. Host does not have required add-on.' What should the administrator check first?

Accepted Answer

That the add-on is downloaded in the vLCM depot.. The error 'Image compliance check failed. Host does not have required add-on' indicates that the vLCM image includes an add-on component that is not present on the host. The first thing to check is whether that add-on is available in the vLCM depot, because if it is not downloaded, vLCM cannot apply it to the host. Ensuring the add-on is in the depot is a prerequisite for successful remediation.

Answer

That the vCenter Service is running.

Answer

That the host has sufficient memory for the add-on.

Answer

That the host has internet access to download the add-on.

Question 14

An organization wants to upgrade ESXi hosts from 7.0 to 8.0 using vLCM. They have a cluster with mixed hardware (different NICs and HBAs). What is the best practice?

Accepted Answer

Create a custom image that includes all necessary drivers and add-ons for the mixed hardware.. vLCM image-based management requires a single desired-state image per cluster, and that image must contain every driver, add-on, and component needed by all hosts in the cluster. With mixed hardware (different NICs and HBAs), the vendor add-on or custom image must bundle the appropriate async drivers so each host can boot and function after remediation. Creating a custom image that includes all necessary drivers and add-ons ensures the desired state is valid for every host, which is the documented best practice for heterogeneous clusters.

Answer

Use vSphere Update Manager baselines instead of vLCM.

Answer

Use a single image with the latest ESXi version and no add-ons.

Answer

Upgrade hosts manually by booting from installation media.

Question 15

A vSphere administrator notices that VMs on a specific ESXi host lose connectivity intermittently. The VMs are on a distributed switch port group. The administrator finds that the Uplink 1 on that host is down. What should the administrator do first?

Accepted Answer

Check the physical switch port configuration for the failed uplink. When an uplink is down on a host attached to a distributed switch, the first step is to verify the physical layer — the physical switch port, cable, and SFP — because the most common cause is a physical link failure or misconfiguration on the upstream switch. Only after confirming the physical layer should you adjust vSphere teaming or failover settings.

Answer

Increase the number of uplinks in the teaming policy

Answer

Set the load balancing policy to Route based on source MAC

Answer

Configure a different failover order