VCP-VVF Practice Test 33 — 15 Questions

Question 1

An administrator is troubleshooting a storage performance issue on an ESXi 9.0 host where multiple virtual machines are experiencing high I/O latency. Which THREE actions can the administrator take to analyze and mitigate the latency? (Choose three.)

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

Accepted Answer

Use esxtop ('d' view) to separate Kernel Latency (KAVG) from Device Latency (DAVG) to determine whether the bottleneck is internal to ESXi or on the storage array.. Analyzing and mitigating storage latency involves checking esxtop storage metrics (DAVG/KAVG), reviewing multipathing policies (Path Selection Policy), checking storage array health and queue depths, and evaluating SIOC settings.

Answer

Disable all host CPU power management states to accelerate storage driver interrupt handling.

Answer

Format the ESXi boot bank with VMFS-6 to clear storage queue buffers.

Question 2

An administrator is troubleshooting a virtual machine network connectivity failure where packets are dropped between two VMs residing on the same ESXi host connected to a standard virtual switch. Which configuration setting on the virtual switch port group could block direct internal traffic between VMs on the same host?

Accepted Answer

Misconfigured Security policies (Promiscuous Mode, MAC Address Changes, Forged Transmits) or Private VLAN (PVLAN) isolations on the switch.. Setting 'Promiscuous Mode', 'MAC Address Changes', or 'Forged Transmits' incorrectly can restrict traffic, but specifically, port security settings or blocked ports can isolate traffic. However, standard virtual switches forward traffic locally unless blocked by security policies or isolated private VLANs (PVLANs) on vDS.

Answer

Enabling Storage I/O Control on the switch uplinks.

Answer

Setting the VMkernel MTU to 1500 bytes.

Answer

Disabling Enhanced vMotion Compatibility (EVC) on the virtual switch.

Question 3

An administrator notices that a vSphere cluster's DRS is not rebalancing the cluster automatically. Upon checking the cluster settings, DRS is configured in 'Manual' mode. What does Manual mode mean for DRS operation?

Accepted Answer

DRS generates migration recommendations when the cluster is imbalanced, but requires an administrator to manually review and apply them.. In Manual mode, DRS generates migration recommendations and placement suggestions when imbalances occur, but it does not execute them automatically; an administrator must manually apply each recommendation.

Answer

DRS only migrates virtual machines when physical hardware fails.

Answer

DRS restricts all migrations to maintenance windows scheduled via vLCM.

Answer

DRS is completely turned off and performs no calculations or monitoring.

Question 4

An administrator is troubleshooting a vSphere HA cluster where virtual machines failed to restart after a simulated host failure. Which TWO cluster configurations should the administrator verify? (Choose two.)

Accepted Answer

Cluster network heartbeating and datastore heartbeat configurations.. When VMs fail to restart during an HA event, admission control settings (which might block power-ons if cluster capacity is insufficient) and network isolation responses or overall HA configuration are key factors to verify.

Answer

vSphere Lifecycle Manager desired state compliance images.

Answer

Storage I/O Control threshold latencies.

Answer

Enhanced vMotion Compatibility (EVC) CPU baseline levels.

Question 5

An administrator is troubleshooting a virtual machine that is experiencing slow performance. The administrator opens vSphere Client performance charts and notices that the guest OS CPU usage is low, but the host CPU ready time for the VM is extremely high. What does this indicate?

Accepted Answer

The host physical CPUs are overcommitted, causing the hypervisor to delay scheduling the virtual machine's vCPUs.. High CPU ready time with low guest OS CPU usage means the VM wants to run and is ready, but the ESXi scheduler is making it wait because the physical host CPUs are heavily overcommitted or constrained.

Answer

The datastore backing the VM is experiencing high I/O latency.

Answer

The virtual machine has been configured with too many vCPUs relative to workload demand.

Answer

The guest operating system's internal firewall is blocking CPU execution threads.

Question 6

An administrator is troubleshooting a performance bottleneck in a vSphere Foundation 9.0 cluster and decides to use esxtop. Which THREE esxtop interactive commands (single keystrokes) toggle between different resource metric views? (Choose three.)

Accepted Answer

Pressing 'd' to view disk adapter statistics. In esxtop, pressing 'c' switches to CPU view, 'm' switches to memory view, 'd' switches to disk adapter view, 'v' switches to virtual disk view, and 'n' switches to network view.

Answer

Pressing 'z' to reboot the ESXi host kernel

Answer

Pressing 'q' to format all VMFS datastores

Question 7

An administrator is investigating an issue where an ESXi 9.0 host is unable to join an Active Directory domain for authentication. Which log file on the ESXi host should the administrator inspect to review authentication and joinservice errors?

Accepted Answer

/var/log/auth.log (or reviewing messages related to lsass / Active Directory authentication). ESXi authentication and Active Directory integration logs are located under /var/log/auth.log or /var/log/vpxd.log (on vCenter), or host-side join logs in /var/log/lsassd.log or similar auth logs.

Answer

/var/log/vmware/vpxd.log

Answer

/var/log/syslog.datastore

Answer

/var/log/vsan.log

Question 8

An administrator is troubleshooting a vCenter Server 9.0 appliance upgrade failure. Where are the installation and upgrade log files stored on the VCSA filesystem for troubleshooting?

Accepted Answer

/var/log/vmware/applmgmt/ and /var/log/firstboot/ (or installer logs in /var/log/). VCSA installer and upgrade logs are located under /var/log/autodeploy or /var/log/vmware/applmgmt/ or installer logs in /var/log/opsli/ or /var/log/firstboot/ depending on the phase. Specifically, /var/log/vmware/applmgmt/ and /var/log/firstboot/ contain upgrade logs.

Answer

/usr/lib/vmware/vpxd/upgrade_error.log

Answer

/etc/vmware/upgrade/psod.log

Answer

/vmfs/volumes/datastore/vcsa-logs.txt

Question 9

An administrator is troubleshooting a storage performance issue on an ESXi 9.0 host where multiple virtual machines are experiencing high I/O latency. Which THREE actions can the administrator take to analyze and mitigate the latency? (Choose three.)

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

Accepted Answer

Rescan the storage adapters on the ESXi host.. When new LUNs are presented from a storage array, the ESXi host must perform a storage adapter rescan to discover the new storage devices and extents.

Answer

Create a new virtual machine on the host.

Answer

Reboot the vCenter Server appliance.

Answer

Restart the CIM monitoring service.

Question 10

An administrator is troubleshooting an ESXi host that has suffered a purple diagnostic screen (PSOD). Which THREE steps should the administrator take to analyze the root cause or prepare the data for VMware Support? (Choose three.)

Accepted Answer

Capture the register values, stack trace, and error message displayed on the PSOD screen (or via IPMI/ILO remote console).. PSOD troubleshooting involves collecting the support bundle (which contains vmkernel.log and crash summaries), identifying the failing module/stack trace from the screen or core dump, and checking hardware health or known VMware Knowledge Base articles.

Answer

Run a Storage vMotion on all virtual machines while the host is in a crashed state.

Answer

Reformat all VMFS datastores on the host to clear corrupted PSOD cache blocks.

Question 11

An administrator notices that a virtual machine has become unresponsive (hung). Which tool or method should the administrator use first to attempt a graceful shutdown or restart of the guest operating system before resorting to a hard power-off?

Accepted Answer

Send a Guest Shutdown or Guest Restart command via the vSphere Client (relying on VMware Tools).. If VMware Tools is running, requesting a guest shutdown sends a graceful ACPI/OS shutdown signal. If unresponsive, resetting via guest or vSphere Client is standard.

Answer

Immediately click 'Power Off' (hard power off) without attempting a guest shutdown.

Answer

Unplug the virtual machine's virtual network adapter.

Answer

Delete the virtual machine and restore it from last night's backup.

Question 12

An administrator is troubleshooting a storage performance issue on an ESXi 9.0 host where multiple virtual machines are experiencing high I/O latency. Which THREE actions can the administrator take to analyze and mitigate the latency? (Choose three.)

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

Accepted Answer

Select the NFS datastore -> Configure -> Connectivity and Reachability tab to check server and export details.. NFS datastore configuration, server IP, and mount shares are verified under Storage -> Datastore -> Configure -> Connectivity or by re-inspecting the mount specification during datastore addition.

Answer

Open the VMkernel adapter binding table under Network Settings.

Answer

Navigate to vSphere HA -> Datastore Heartbeats.

Answer

Check the vSphere Lifecycle Manager baseline repository.

Question 13

An administrator is troubleshooting a storage performance issue on an ESXi 9.0 host where multiple virtual machines are experiencing high I/O latency. Which THREE actions can the administrator take to analyze and mitigate the latency? (Choose three.)

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

Accepted Answer

vSAN Congestion counters (such as adaptive queue congestion or memory buffer congestion). Critical vSAN performance metrics include read/write IOPS, throughput, latency (client, server, and network latency), and object-level congestion counters.

Answer

ESXi host CPU core thermal temperature sensor logs

Answer

vCenter Database connection pool utilization rate

Question 14

An administrator is troubleshooting a vSphere Distributed Switch (vDS) configuration where LACP (Link Aggregation Control Protocol) is enabled between ESXi hosts and the physical upstream switches. The port channel is down. Which command or log file should the administrator check on the ESXi host to inspect LACP state and negotiation status?

Accepted Answer

esxcli network vswitch dvs lacp status get or inspecting lacp logs in /var/log/. ESXi provides net-vmswitch and esxcli network vswitch dvs lacp commands or log inspection in /var/log/lacp.log or vpxd.log to check LACP state.

Answer

esxcli storage core path list

Answer

esxcli system ip route list

Answer

esxcli vsan cluster get

Question 15

An administrator is troubleshooting a vSAN 9.0 stretched cluster network separation issue. Which THREE network requirements must be strictly met between the data sites and the witness site to ensure proper vSAN stretched cluster operation? (Choose three.)

Accepted Answer

Maximum latency of 10 milliseconds round-trip time (RTT) between the two primary data sites.. vSAN stretched clusters require specific latency limits (e.g., < 10ms round-trip time between data sites, < 100ms between data sites and witness), dedicated bandwidth, and non-routable or routable IP connectivity depending on layout, with specific MTU support.

Answer

Running all virtual machines in nested ESXi environments across the witness site.

Answer

Completely disabling all physical switch firewalls and spanning tree protocols across all access ports.