VCP-VVF Practice Test 34 — 15 Questions

Question 1

An administrator is troubleshooting a virtual machine performance issue in a vSphere 9.0 cluster. The VM has 8 vCPUs, but the guest OS workload is single-threaded and running slowly. Upon checking esxtop, the administrator notices high co-stop (%CSTP) time. What is the recommended optimization action?

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

Accepted Answer

Reduce the number of vCPUs assigned to the virtual machine to match its actual workload concurrency requirements.. Assigning too many vCPUs (oversizing) to a single-threaded workload forces the ESXi scheduler to wait for all vCPUs to be ready simultaneously before scheduling them (%CSTP), hurting performance. Right-sizing the VM by reducing the vCPU count resolves this.

Answer

Switch the vDS uplink teaming policy from Route Based on Originating Port to IP Hash.

Answer

Enable Storage I/O Control on the datastore.

Answer

Increase the virtual machine memory reservation to 100%.

Question 2

An administrator notices that an ESXi host's time is out of sync with the NTP server. Where in the vSphere Client should the administrator configure or restart the NTP service for the host?

Accepted Answer

Select the ESXi host -> Configure -> System -> Time Configuration (Date and Time).. NTP time synchronization and date/time settings on an ESXi host are configured under Host -> Configure -> Time Configuration (Date and Time).

Answer

Open virtual machine settings -> Guest OS Time.

Answer

Navigate to vCenter Administration -> Licensing -> Time Sync.

Answer

Check the vSphere Lifecycle Manager repository tab.

Question 3

An administrator is troubleshooting a storage connectivity failure on an ESXi host utilizing software iSCSI. Which THREE configurations or troubleshooting steps are required to ensure correct iSCSI multipathing and connectivity? (Choose three.)

Accepted Answer

Ensure that physical switch ports and ESXi uplinks support multipathing and that no firewall rules block iSCSI TCP port 3260.. Software iSCSI best practices require binding VMkernel ports to the iSCSI software adapter (port binding), configuring multiple active physical NICs for multipathing, ensuring correct target discovery IP addresses, and verifying CHAP authentication if applicable.

Answer

Configure Enhanced vMotion Compatibility (EVC) on the iSCSI target array.

Answer

Ensure that all iSCSI datastores are formatted with FAT32 to maximize block allocation speed.

Question 4

An administrator is investigating a performance issue where an ESXi 9.0 host's physical network adapters are experiencing dropped packets due to buffer exhaustion. Which esxcli command or network tuning approach can be used to check or adjust receive (RX) ring buffer sizes on a physical network adapter (vmnic)?

Accepted Answer

esxcli network nic ring get -n vmnicX and esxcli network nic ring set. 'esxcli network nic ring get' and 'esxcli network nic ring set' allow administrators to inspect and modify RX/TX ring buffer sizes on supported physical network adapters in ESXi.

Answer

esxcli vswitch standard buffer modify

Answer

esxcli hardware pnic buffer get

Answer

esxcli network ip buffer list

Question 5

An administrator is troubleshooting a vSAN 9.0 cluster where performance has degraded. Which TWO tools or dashboards within vSphere and Aria Operations can help diagnose vSAN performance bottlenecks? (Choose two.)

Accepted Answer

VMware Aria Operations vSAN management dashboards and metric correlation views. vSAN performance service in vSphere Client and Aria Operations vSAN dashboards provide detailed insights into IOPS, throughput, latency, and component health.

Answer

vSphere Lifecycle Manager desired state compliance report

Answer

Enhanced vMotion Compatibility (EVC) configuration wizard

Answer

vCenter License Allocation summary tab

Question 6

An administrator is investigating a storage performance bottleneck on an ESXi host using esxtop. In the disk adapter view ('d'), the administrator observes high DAVG/LAT values while KAVG/LAT remains near zero. What conclusion should the administrator draw from these metrics?

Accepted Answer

The latency is originating from the physical storage array, SAN fabric, or HBAs, rather than the ESXi kernel storage stack.. DAVG measures overall device latency (time spent at the storage array and transport layer), while KAVG measures time spent in the ESXi kernel. Low KAVG and high DAVG point directly to the storage array or SAN fabric as the source of latency.

Answer

Transparent Page Sharing (TPS) is thrashing the datastore metadata.

Answer

The ESXi host queue depth is misconfigured and needs to be reduced to zero.

Answer

The virtual machine guest operating system is experiencing CPU starvation.

Question 7

An administrator is troubleshooting a vSphere cluster where virtual machines are migrating too frequently or not migrating when load is unbalanced. Which TWO DRS settings can the administrator adjust to tune migration behavior? (Choose two.)

Accepted Answer

DRS Migration Threshold (slider from conservative to aggressive). DRS migration behavior can be tuned by adjusting the migration threshold (aggressiveness) and setting automation levels (Fully Automated, Semi-Automated, Manual).

Answer

Enhanced vMotion Compatibility (EVC) baseline

Answer

vSphere HA Admission Control Percentage

Answer

Storage I/O Control Latency Threshold

Question 8

An administrator is troubleshooting high memory utilization on an ESXi 9.0 host and wants to identify which virtual machines are consuming the most memory. Which TWO methods can the administrator use to view VM memory consumption? (Choose two.)

Accepted Answer

esxtop command-line utility (pressing 'm' to view memory metrics per world/VM).. VM memory consumption can be viewed via vSphere Client performance charts (Host -> Monitor -> Performance -> Memory) and esxtop memory view ('m').

Answer

vSphere Lifecycle Manager desired state compliance dashboard.

Answer

Enhanced vMotion Compatibility (EVC) summary page.

Answer

vSphere HA datastore heartbeat configuration tab.

Question 9

An administrator is reviewing vSphere HA settings and notices that 'Host Isolation Response' is set to 'Power Off'. What happens to virtual machines running on an ESXi host if that host becomes network-isolated from the rest of the cluster?

Accepted Answer

vSphere HA powers off the virtual machines on the isolated host and attempts to restart them on surviving hosts in the cluster.. When an ESXi host is network isolated and the isolation response is set to Power Off, vSphere HA powers off the virtual machines on that host so they can be restarted on surviving healthy hosts.

Answer

The isolated host immediately reboots its physical motherboard.

Answer

Virtual machines remain running in an isolated sandbox with no access to shared storage.

Answer

DRS automatically migrates the isolated host to a secondary management network.

Question 10

An administrator is troubleshooting a high-availability failover issue in a vSphere 9.0 cluster where virtual machines on a failed host were not restarted by vSphere HA. Which THREE underlying causes could explain this failure? (Choose three.)

Accepted Answer

A complete network partition occurred where the surviving hosts cannot communicate with the isolated host and datastore heartbeats were also unavailable.. Common reasons for HA failover failure include insufficient cluster compute resources under admission control, network isolation without configured isolation response, or datastore accessibility loss affecting heartbeat files and cluster communication.

Answer

Enhanced vMotion Compatibility (EVC) mode was disabled on the cluster.

Answer

Storage I/O Control (SIOC) latency threshold was set below 10ms.

Question 11

An administrator needs to monitor CPU utilization trends across multiple virtual machines to determine if right-sizing is required. Which vSphere Foundation feature provides native performance charts, metrics collection, and historical reporting directly within the vCenter interface?

Accepted Answer

vSphere Performance Charts. vCenter Performance Charts provide built-in real-time and historical monitoring metrics for CPU, memory, network, and storage utilization.

Answer

vSphere Trust Authority

Answer

vSphere Fault Tolerance

Answer

Storage I/O Control (SIOC)

Question 12

You are configuring a vSphere Cluster to ensure virtual machine availability during host maintenance. Which feature must be enabled to automatically migrate VMs off a host when it is placed into Maintenance Mode?

Accepted Answer

vSphere Distributed Resource Scheduler (DRS). vSphere Distributed Resource Scheduler (DRS) automates the placement and migration of virtual machines, including the evacuation of hosts during Maintenance Mode.

Answer

Storage DRS

Answer

vSphere Fault Tolerance (FT)

Answer

vSphere High Availability (HA)

Question 13

An administrator needs to upgrade host firmware and drivers across a cluster in a consistent manner. Which tool is best suited for this task?

Accepted Answer

vSphere Lifecycle Manager. vSphere Lifecycle Manager (vLCM) allows for declarative management of host images, including firmware and driver baselines.

Answer

VMware Update Manager

Answer

vCenter Server Profiles

Answer

Host Profiles

Question 14

Which TWO actions are required to perform a successful cold migration of a virtual machine between two different vCenter servers?

Accepted Answer

The virtual machine must be powered off. Cold migration requires both vCenters to be accessible and the source/destination storage to be compatible.

Answer

The VM must have a snapshot

Answer

vSphere Fault Tolerance must be enabled on the source

Answer

Both hosts must have the exact same hardware model

Question 15

An administrator is troubleshooting a storage performance problem where virtual machines are experiencing high I/O latency. Which TWO techniques or features can help optimize storage performance in a vSphere Foundation environment? (Choose two.)

Accepted Answer

Configure the Path Selection Policy (PSP) to 'Round Robin' for multi-pathing active-active storage arrays to balance I/O across available paths.. Storage performance can be optimized by enabling Storage I/O Control (SIOC) to manage queue contention, using all-flash storage or vSAN disk groups with appropriate caching, and selecting correct Path Selection Policies (PSP) like Round Robin for multi-pathing.

Answer

Set the virtual machine memory reservation to 0% to free up storage overhead.

Answer

Set all VMDK files to thick-provision lazy zeroed across all datastores regardless of available capacity.

Answer

Disable all ESXi firewall rules to accelerate network-attached storage traffic.