VCP-DCV Practice Test 8 — 10 Questions

Question 1

Refer to the exhibit. An administrator notices that two uplinks are down on the VDS. Which step should be taken first to restore redundancy?

Accepted Answer

Check the physical switch ports and cables for uplink2 and uplink3.

Answer

Increase the MTU to 9000 to improve performance.

Answer

Disable LACP on the VDS to allow single-uplink operation.

Answer

Remove the down uplinks from the VDS.

Question 2

Refer to the exhibit. An administrator attempts to add a host to a vSAN cluster and receives this error. Which step should the administrator take to resolve the issue?

Accepted Answer

Create a new VMkernel adapter (vmk3) on the host's network and enable vSAN traffic.. vSAN requires a dedicated VMkernel interface with the vSAN service enabled. The host has management, vMotion, and provisioning interfaces but none with vSAN enabled. The administrator must create a new VMkernel adapter (e.g., vmk3) on a host network and enable the vSAN service on it.

Answer

Reconfigure the vMotion interface (vmk1) to also carry vSAN traffic.

Answer

Add the host to the cluster without vSAN and enable vSAN later.

Answer

Enable vSAN traffic on the existing vmk0 interface.

Question 3

An administrator is troubleshooting a VM that is experiencing high latency on its virtual disks. The VM is connected to a vSphere datastore backed by an NFS share. The ESXi host has multiple VMkernel ports configured for NFS traffic. Which configuration change is most likely to improve storage performance?

Accepted Answer

Configure multiple VMkernel ports for NFS and enable port binding with a route based on originating port ID policy.. NFS port binding (also known as NFS multipathing) allows multiple VMkernel ports to be used for NFS traffic, and when combined with a 'route based on originating port ID' load-balancing policy, it enables the ESXi host to distribute NFS I/O across multiple physical NICs and paths. This increases aggregate throughput and reduces latency by avoiding congestion on a single VMkernel port or physical link, which is the most effective change for improving storage performance in this scenario.

Answer

Use a single VMkernel port for NFS and configure it with the highest priority.

Answer

Enable jumbo frames on the NFS VMkernel port and the physical switches.

Answer

Increase the disk queue depth on the VM's virtual SCSI controller.

Question 4

Which TWO factors contribute to increased CPU ready time on a vSphere host?

Accepted Answer

Over-provisioning of vCPUs relative to physical cores.. Over-provisioning vCPUs relative to physical cores leads to contention for CPU resources. When the total number of vCPUs across all powered-on VMs exceeds the number of logical processors (including hyper-threads), the ESXi scheduler must time-share access, resulting in increased ready time as VMs wait for a physical core to become available.

Answer

Memory ballooning due to memory over-commitment.

Answer

Using CPU affinity to pin VMs to specific cores.

Answer

High disk latency on the datastore.

Question 5

Refer to the exhibit. The performance data shows MEMCTL at 5% and SWPOUT at 2%. What does this indicate about the host?

Accepted Answer

The host is over-committed on memory, causing ballooning and swapping.. MEMCTL at 5% indicates the ESXi host's memory balloon driver (vmmemctl) is actively reclaiming memory from virtual machines, while SWPOUT at 2% shows the host is swapping guest memory to disk. Together, these values confirm the host is over-committed on memory, forcing the hypervisor to use both ballooning and swapping to free up memory for VMs.

Answer

The host is experiencing CPU contention.

Answer

The host has network congestion.

Answer

The host has high storage latency.

Question 6

An administrator configures permissions as shown in the exhibit. Users 'user1' and 'user2' are in the 'Limited' role which only allows 'Read' and 'Console interaction' privileges. User1 reports being unable to open a console to a VM running on host2.domain.com. What is the most likely cause?

Accepted Answer

User1 does not have permissions on host2.domain.com. User1 has permissions only on host1, not on host2.domain.com. The 'Limited' role, which includes 'Read' and 'Console interaction' privileges, is assigned at the host level for host1 only, so it does not apply to host2. Therefore, user1 lacks any permissions on host2, preventing console access to VMs running there. Option A is incorrect because the 'Limited' role does include 'Console interaction' privilege as stated. Option C is incorrect because the permissions are applied at the host level (as shown in the exhibit), not at the datacenter level. Option D is incorrect because there is no requirement or indication that user1 needs to be added to the admin group; the issue is simply lack of permissions on the target host.

Answer

The 'Limited' role does not include 'Console interaction' privilege

Answer

The permissions are applied at the datacenter level, not the host level

Answer

User1 should be added to the admin group

Question 7

Refer to the exhibit. An engineer tries to ping the DNS server 10.0.0.1 from the management interface vmk0 but gets 'Network is unreachable'. What is the most likely cause?

Accepted Answer

The vmk0 interface does not have a default gateway configured; the default gateway is on vmk1.. The routing table shows the default gateway is on vmk1 (192.168.20.1), but vmk0 is on a different subnet (192.168.10.0/24). Traffic from vmk0 to 10.0.0.1 is not directly reachable and must go through a gateway. Since there is no route for 10.0.0.0/24 or default route via vmk0, the kernel reports network unreachable. The correct fix is to add a default gateway on vmk0 or a specific route.

Answer

The DNS server 10.0.0.1 is down.

Answer

The MTU of 1500 is too small for DNS traffic.

Answer

The DNS server IP address is misconfigured.

Question 8

A vSphere administrator is tasked with scaling a cluster to support a new workload that requires high network throughput. The existing hosts have 10GbE NICs and are using the default vmnic driver. Which technology can improve network performance without additional hardware?

Accepted Answer

Enable NetQueue and increase the number of RX queues.. NetQueue is a VMware technology that distributes network packet processing across multiple CPU cores by increasing the number of receive (RX) queues on the physical NIC. This reduces CPU bottlenecks and improves throughput for high-bandwidth workloads without requiring additional hardware. The default vmnic driver in vSphere supports NetQueue, making it a software-only performance enhancement.

Answer

Enable SR-IOV on the physical NICs.

Answer

Increase the number of vCPUs for each VM.

Answer

Use vSphere vMotion to balance load.

Question 9

Refer to the exhibit. A virtual machine on the VM Network is experiencing intermittent connectivity. The administrator notices that vmnic0 is saturated. Which action would improve performance without causing a single point of failure?

Accepted Answer

Configure load-based teaming on vSwitch0 for the VM Network portgroup.

Answer

Change the active uplinks for VM Network to vmnic1 only.

Answer

Increase the MTU on vSwitch0 to 9000.

Answer

Move the VM Network to vSwitch1.

Question 10

A vSphere cluster with 3 ESXi hosts (each with 2 sockets, 8 cores per socket, hyperthreading enabled, and 256 GB RAM) runs a set of web server VMs. The cluster is configured with DRS enabled and a migration threshold of 3 (conservative). The administrator notices that one host has consistently high CPU ready time (average 15%) while the other two hosts have ready time below 2%. The host with high ready time has 10 VMs, while the others have 6 each. CPU utilization on the busy host is 80%, while on the other hosts it is 40%. What should the administrator do to improve the situation with minimal disruption?

Accepted Answer

Increase the DRS migration threshold to a more aggressive value (e.g., 4 or 5).. The cluster is unbalanced because DRS is not migrating VMs aggressively enough. Increasing the DRS migration threshold to a more aggressive level will allow DRS to move VMs from the overloaded host to the underutilized hosts. Option D is the best immediate step. Option A would increase overhead and is not best practice. Option B would be effective but requires manual intervention and may not be the simplest. Option C would add capacity but is a longer-term solution.

Answer

Disable Hyper-Threading on all hosts to reduce vCPU contention.

Answer

Manually migrate some VMs from the overloaded host to the other hosts using vMotion.

Answer

Add a fourth host to the cluster.