VMware 2V0-621 Online Practice Questions and Exam Preparation

VMware 2V0-621 Online Questions & Answers

• Question 101:

  Refer to the Exhibit.

  

  What will be created upon completion of the steps in this wizard?

  A. 100GB VMFS5 datastore with free space available for expansion
  B. 100GB VMFS5 datastore with free space available for a second datastore
  C. 100GB VMFS3 datastore
  D. 200.01 GB VMFS5 datastore
  A. 100GB VMFS5 datastore with free space available for expansion

  ---

  The datastore size selected is 100GB. On competition of this step, 100 GB VMFS datastore will be created.

• Question 102:

  Which two features are deprecated in Network I/O Control 3 (NIOC3)? (Choose two.)

  A. Class Of Service (COS) Tagging
  B. Bandwidth Allocation
  C. User-defined network resource pools
  D. Admission control
  A. Class Of Service (COS) Tagging
  C. User-defined network resource pools

  ---

  : The upgrade of a NIOC to version 3 is disruptive. Certain functionality is available only in NIOC v2 and is removed during the upgrade to version 3:

  User-defined network resource pools including all associations between them and existing distributed port groups

  You can preserve certain resource allocation settings by transferring the shares from the user-defined network resource pools to shares for individual network adapters.

  Existing associations between ports and user-defined network resource pools

  In Network I/O Control version 3, you cannot associate an individual distributed port to a network resource pool that is different from the pool assigned to the parent port group.

  CoS tagging of the traffic that is associated with a network resource pool

  Network I/O Control version 3 does not support marking traffic that has higher QoS demands with CoS tags. After the upgrade, to restore CoS tagging of traffic that was associated with a user-defined network resource pool, use the traffic

  filtering and marking networking policy.

  Reference: http://www.virten.net/2015/09/vcp6-delta-part-7-network-enhancements/

• Question 103:

  An administrator needs to create an Integrated Windows Authentication (IWA) Identity Source on a newly deployed vCenter Server Appliance (VCSA).

  Which two actions will accomplish this? (Choose two.)

  A. Use a Service Principal Name (SPN) to configure the Identity Source.
  B. Use a Domain administrator to configure the Identity Source.
  C. Join the VCSA to Active Directory and configure the Identity Source with a Machine Account.
  D. Create a computer account in Active Directory for the VCSA and configure the Identity Source.
  A. Use a Service Principal Name (SPN) to configure the Identity Source.
  C. Join the VCSA to Active Directory and configure the Identity Source with a Machine Account.

  ---

  A-) Configuring Active Directory as Identity Source for use with SSO 6.0 can be done in 2 ways

  a.

  Use the Machine Account(Any AD Account) b. Use with Service Principal Name

  b.

  Prerequisites :1. A domain account with domain administrator privileges is required when assigning a SPN to an account. 2. A domain account with domain user privileges is a minimum requirement for the account to be used as the SPN account.

  c.

  https://pubs.vmware.com/vsphere-60/index.jsp#com.vmware.vsphere.security.doc/GUID-4D24C6E8-63F5-4E35-862E-B59A03703254.html?resultof=%2522%2573%2570%256e%2522%2520

  C-) VCSA- If you want to configure permissions for users and groups from an Active Directory domain to access the vCenter Server components, you must join its associated embedded or external Platform Services Controller instance to the Active Directory domain. https://pubs.vmware.com/vsphere60/index.jsp?topic=%2Fcom.vmware.vsphere.vcsa.doc%2FGUID-08EA2F92-78A7-4EFF-880E-2B63ACC962F3.html

• Question 104:

  What will occur if the .nvram file is deleted from a powered off virtual machine?

  A. The .nvram file will get created the next time the virtual machine is powered on.
  B. Restoring the file from backup is needed to allow the virtual machine to power on.
  C. The virtual machine will fail to power on and enter an Orphaned state.
  D. The virtual machine will fail to power on and enter an Inaccessible state.
  A. The .nvram file will get created the next time the virtual machine is powered on.

  ---

  The .nvram file. This small file contains the BIOS that is used when the VM boots. It is similar to a physical server that has a BIOS chip that lets you set hardware configuration options. A VM also has a virtual BIOS that is contained in the NVRAM file. The BIOS can be accessed when a VM first starts up by pressing the F2 key. Whatever changes are made to the hardware configuration of the VM are then saved in the NVRAM file. This file is in binary format and if deleted it will be automatically re-created when a VM is powered on.

  Reference: http://searchvmware.techtarget.com/tip/Understanding-the-files-that-make-up-a-VMware-virtual-machine

• Question 105:

  An administrator is troubleshooting a virtual machine performance issue using vRealize Operations.

  Which two badges would help to identify possible resource contention concerns? (Choose two.)

  A. Health > Workload
  B. Health > Faults
  C. Risk > Time Remaining
  D. Risk > Stress
  A. Health > Workload
  D. Risk > Stress

  ---

  The Workload badge shows how hard an object is working. A higher workload score indicates that an object is doing more work. Obviously, you don't want objects out there doing zero work, as that is waste but, as the same time, you also don't want objects completely maxed out with a workload score of 100 either. Workload is an absolute measurement that calculates the demand for a resource divided by the capacity of an object. Resources might include CPU, memory, disk I/O, or network I/O. vC Ops will help you to balance workload across your resource objects effectively.

  Stress badge reports the stress that an object is under. Just as your stress level is related to your workload, so is the stress score in vC Ops. The stress score is based on long-term high workload (where the workload score is instantaneous workload). Stress in the virtual infrastructure might come from VMs that are undersized, hosts that are overloaded, or datastores with consistently high I/O latency. Stress is reported between 0 and 100 with 100 being very high stress and 0 being no stress. Reference: http://blogs.vmware.com/management/2014/04/david-davis-on-vcenter-operations-post-8-understanding-vcenter-operations-badges.html

• Question 106:

  An administrator is concerned about possible vCPU over-commitment for an ESXi 6.x host.

  Which two Performance Counters should be reviewed in the vSphere Web Client Performance Charts to confirm if there is contention on the host? (Choose two.)

  A. Wait
  B. Ready
  C. Core Utilization
  D. Co-Stop
  B. Ready
  D. Co-Stop

  ---

  To check vCPU over commitment for an Esxi 6.0 host>>>>>performance Tab>>>>Graph etc.

  Ready - Amount of time the virtual machine was ready to run, waiting in a queue to be scheduled.

  Co-Stop - Amount of time a SMP virtual machine was ready to run, but incurred delay due to co-vCPU scheduling contention.

  These performance metrics can be reviewed using the Performance tab in the vSphere Client or using the esxtop or resxtop command-line utilities. Choose the most appropriate method for your environment. Make note of the four metrics

  displayed. Each is measured in milliseconds

  https://kb.vmware.com/selfservice/microsites/search.do?language=en_USandcmd=displayKCandexternalId=1017926

• Question 107:

  An administrator observes the following symptoms for a virtual machine:

  1.

  CPU usage is consistently above 90%

  2.

  CPU ready value is consistently above 20%.

  3.

  Application performance is impacted.

  Which two actions should the administrator take to improve the performance of this virtual machine? (Choose two.)

  A. Increase the number of vCPUs assigned to this virtual machine.
  B. Decrease the number of vCPUs assigned to this virtual machine.
  C. Verify that VMware Tools is installed on every virtual machine on the host.
  D. Increase the CPU shares assigned to the virtual machine.
  C. Verify that VMware Tools is installed on every virtual machine on the host.
  D. Increase the CPU shares assigned to the virtual machine.

  ---

  Solutions for Consistently High CPU Usage

  Temporary spikes in CPU usage indicate that you are making the best use of CPU resources. Consistently high CPU usage might indicate a problem. You can use the vSphere Client CPU performance charts to monitor CPU usage for hosts,

  clusters, resource pools, virtual machines, and vApps.

  Problem

  Host CPU usage constantly is high. A high CPU usage value can lead to increased ready time and processor queuing of the virtual machines on the host.

  Virtual machine CPU usage is above 90% and the CPU ready value is above 20%. Application performance is impacted.

  Cause

  The host probably is lacking the CPU resources required to meet the demand.

  Solution

  Verify that VMware Tools is installed on every virtual machine on the host.

  Compare the CPU usage value of a virtual machine with the CPU usage of other virtual machines on the host or in the resource pool. The stacked bar chart on the host's Virtual Machine view shows the CPU usage for all virtual machines on

  the host.

  Determine whether the high ready time for the virtual machine resulted from its CPU usage time reaching the CPU limit setting. If so, increase the CPU limit on the virtual machine. Increase the CPU shares to give the virtual machine more

  opportunities to run. The total ready time on the host might remain at the same level if the host system is constrained by CPU. If the host ready time doesn't decrease, set the CPU reservations for high-priority virtual machines to guarantee

  that they receive the required CPU cycles.

  Increase the amount of memory allocated to the virtual machine. This action decreases disk and or network activity for applications that cache. This might lower disk I/O and reduce the need for the host to virtualize the hardware. Virtual

  machines with smaller resource allocations generally accumulate more CPU ready time.

  Reduce the number of virtual CPUs on a virtual machine to only the number required to execute the workload. For example, a single-threaded application on a four-way virtual machine only benefits from a single vCPU. But the hypervisor's

  maintenance of the three idle vCPUs takes CPU cycles that could be used for other work.

  If the host is not already in a DRS cluster, add it to one. If the host is in a DRS cluster, increase the number of hosts and migrate one or more virtual machines onto the new host.

  Upgrade the physical CPUs or cores on the host if necessary.

  Use the newest version of hypervisor software, and enable CPU-saving features such as TCP Segmentation Offload, large memory pages, and jumbo frames.

  Reference:

  https://pubs.vmware.com/vsphere-51/index.jsp?topic=%2Fcom.vmware.vsphere.monitoring.doc%2FGUID-5F8147A1-6416-4D29-BA3D-E4CED3966016.html

• Question 108:

  Which two statements are true regarding Virtual SAN Fault Domains? (Choose two.)

  A. They enable Virtual SAN to tolerate the failure of an entire physical rack.
  B. Virtual SAN ensures that no two replicas are provisioned on the same domain.
  C. Virtual SAN ensures that all replicas are provisioned on the same domain.
  D. They require VMware High Availability (HA) to ensure component distribution across domains.
  A. They enable Virtual SAN to tolerate the failure of an entire physical rack.
  B. Virtual SAN ensures that no two replicas are provisioned on the same domain.

  ---

  Managing Fault Domains in Virtual SAN Clusters If your Virtual SAN cluster spans across multiple racks or blade server chassis in a data center and you want to make sure that your hosts are protected against rack or chassis failure, you can create fault domains and add one or more hosts to each fault domain. A fault domain consists of one or more Virtual SAN hosts grouped together according to their physical location in the data center. When configured, fault domains enable Virtual SAN to tolerate failures of entire physical racks as well as failures of a single host, capacity device, network link or a network switch dedicated to a fault domain.

  Reference: https://pubs.vmware.com/vsphere-60/index.jsp?topic=%2Fcom.vmware.vsphere.virtualsan.doc%2FGUID-8491C4B0-6F94-4023-8C7A-FD7B40D0368D.html

• Question 109:

  An administrator is troubleshooting a CPU issue for a virtual machine. The following is seen in esxtop:

  1.

  CPU0 is at 100% usage

  2.

  The remaining logical CPUs are close to 0%

  3.

  %RDY value is consistently above 10%

  What is likely the cause of the CPU issue?

  A. The virtual machine has a CPU limit configured.
  B. The virtual machine's guest operating system is configured for SMP.
  C. The virtual machine has CPU affinity configured.
  D. The virtual machine is configured with a CPU reservation.
  C. The virtual machine has CPU affinity configured.

  ---

  Using CPU Affinity

  By specifying a CPU affinity setting for each virtual machine, you can restrict the assignment of virtual machines to a subset of the available processors in multiprocessor systems. By using this feature, you can assign each virtual machine to

  processors in the specified affinity set.

  CPU affinity specifies virtual machine-to-processor placement constraints and is different from the relationship created by a VM-VM or VM-Host affinity rule, which specifies virtual machine-to-virtual machine host placement constraints.

  Reference:

  https://pubs.vmware.com/vsphere-4-esx-vcenter/index.jsp?topic=/com.vmware.vsphere.resourcemanagement.doc_41/managing_cpu_resources/c_using_cpu_affinity.html

• Question 110:

  An administrator wants to clone the configuration of an existing ESXi6.x host to a new group of hosts, but does not want to clone storage specific settings. Which action would accomplish this?

  A. Remove sub-profile
  B. Revert profile
  C. Uncheck sub-profile
  D. Disable VM Storage profile
  A. Remove sub-profile