VMware 2V0-621 Online Practice Questions and Exam Preparation

VMware 2V0-621 Online Questions & Answers

• Question 111:

  An administrator is having a problem configuring Storage I/O Control on a Datastore.

  Which two conditions could explain the issue? (Choose two.)

  A. A host is running ESXi 4.0.
  B. An ESXi host does not have appropriate licensing.
  C. The vCenter Server version is 5.0.
  D. The vCenter Server License is Standard.
  A. A host is running ESXi 4.0.
  B. An ESXi host does not have appropriate licensing.

  ---

  A-) Storage I/O Control was introduced in vSphere 4.1, taking storage resource controls built into vSphere to a much broader level. In vSphere 5, Storage I/O Control has been enhanced with support for NFS data stores and clusterwide I/O shares. Check vmware.com esxi versions enhancements, for further troubleshooting https://kb.vmware.com/kb/1022091 B-) If hosts are not licensed at the appropriate level, the option to enable Storage I/O control is grayed out. Check: https://kb.vmware.com/kb/2021530

• Question 112:

  Which three parameters should be considered when calculating the bandwidth for vSphere Replication? (Choose three.)

  A. Data change rate
  B. Traffic rates
  C. Link speed
  D. Application type
  E. Hardware type
  A. Data change rate
  B. Traffic rates
  C. Link speed

  ---

  The amount of network bandwidth that vSphere Replication requires to replicate virtual machines efficiently depends on several factors in your environment.

  1.

  Network-based storage

  2.

  Size of dataset

  3.

  Data change rate

  4.

  Recovery point objective (RPO)

  5.

  Link speed

  Reference: https://kb.vmware.com/selfservice/microsites/search.do?language=en_USandcmd=displayKCandexternalId=2037268

• Question 113:

  A task fails while creating a VMFS5 datastore on a disk with these characteristics:

  1.

  Was previously used by a Linux server

  2.

  Was not erased

  3.

  Is visible with the vSphere Web Client

  Which action can be performed to resolve the issue?

  A. Delete the partitions on the disk manually with partedUtil first.
  B. Create a VMFS3 file system first, then upgrade it.
  C. Create the VMFS5 file system manually using vmkfstools.
  D. Delete the data with the vmkfstools command.
  A. Delete the partitions on the disk manually with partedUtil first.

  ---

  Please refer to link to understand more about it: https://kb.vmware.com/selfservice/microsites/search.do?language=en_USandcmd=displayKCandexternalId=2046610

• Question 114:

  Which two statements are true regarding iSCSI adapters? (Choose two.)

  A. Software iSCSI adapters require vmkernel networking.
  B. Independent Hardware iSCSI adapters offload processing from the ESXi host.
  C. Dependent Hardware iSCSI adapters do not require vmkernel networking.
  D. Independent Hardware iSCSI adapters require vmkernel networking.
  A. Software iSCSI adapters require vmkernel networking.
  B. Independent Hardware iSCSI adapters offload processing from the ESXi host.

  ---

  : Software iSCSI Adapter A software iSCSI adapter is a VMware code built into the VMkernel. It allows your host to connect to the iSCSI storage device through standard network adapters. The software iSCSI adapter handles iSCSI processing while communicating with the network adapter. With the software iSCSI adapter, you can use iSCSI technology without purchasing specialized hardware.

  Hardware iSCSI Adapter A hardware iSCSI adapter is a third-party adapter that offloads iSCSI and network processing from your host. Hardware iSCSI adapters are divided into categories. Dependent Hardware iSCSI Adapter Depends on VMware networking, and iSCSI configuration and management interfaces provided by VMware. This type of adapter can be a card that presents a standard network adapter and iSCSI offload functionality for the same port. The iSCSI offload functionality depends on the host's network configuration to obtain the IP, MAC, and other parameters used for iSCSI sessions. An example of a dependent adapter is the iSCSI licensed Broadcom 5709 NIC. Independent Hardware iSCSI Adapter Implements its own networking and iSCSI configuration and management interfaces. An example of an independent hardware iSCSI adapter is a card that either presents only iSCSI offload functionality or iSCSI offload functionality and standard NIC functionality. The iSCSI offload functionality has independent configuration management that assigns the IP, MAC, and other parameters used for the iSCSI sessions. An example of a independent adapter is the QLogic QLA4052 adapter. Hardware iSCSI adapters might need to be licensed. Otherwise, they will not appear in the client or vSphere CLI. Contact your vendor for licensing information

  Reference: https://pubs.vmware.com/vsphere-60/topic/com.vmware.ICbase/PDF/vsphere-esxi-vcenter-server-60-storage-guide.pdf

• Question 115:

  An administrator as creating a new Content Library. It will subscribe to another remote Content Library without authentication enabled. Optimal performance is desired for the configuration. What two steps should be taken to set up the library? (Choose two.)

  A. The library should be published externally.
  B. The Subscription URL should be provided.
  C. A datastore should be used for this library.
  D. A file system should be used for this library.
  B. The Subscription URL should be provided.
  C. A datastore should be used for this library.

  ---

  In order to create a content library for optimal performance, you should first provide subscription URL for the library to connect with the remote one. You need a datastore for the library too.

• Question 116:

  Which three troubleshooting actions should an administrator take to address slow performance when deploying a virtual machine template? (Choose three.)

  A. Increase network throughput by adding additional uplinks to the vSwitch.
  B. Change the destination datastore or volume for the virtual machine template.
  C. Configure a Provisioning Traffic vmkernel port to perform the deployment operation.
  D. Reduce the size of the virtual machine template's virtual disk.
  E. Deploy the virtual machine template to the cluster and allow Distributed Resource Scheduler to register the virtual machine.
  A. Increase network throughput by adding additional uplinks to the vSwitch.
  B. Change the destination datastore or volume for the virtual machine template.
  C. Configure a Provisioning Traffic vmkernel port to perform the deployment operation.

  ---

  Validate that each troubleshooting step below is true for your environment. Each step will provide instructions or a link to a document, in order to eliminate possible causes and take corrective action as necessary. The steps are ordered in the most appropriate sequence to isolate the issue and identify the proper resolution. Do not skip a step.

  1.

  Verify if the slow deployment is specific to one template or if it affects all templates. To properly test this, VMware recommends to create a brand new template and test the deployment. This provides a clean test of the environment. For more information if template deployment is slow for a single template, see Deploying a single template is slow in vCenter Server (1004028).

  2.

  If you are using ESX (not applicable to ESXi), verify that no processes are over utilizing the resources on the ESX Service Console. For more information, see Checking for resource starvation of the ESX Service Console (1003496).

  3.

  Verify that the network configuration on the ESX/ESXi host is optimized for the best performance, including speed and duplex settings. For more information, see Configuring the speed and duplex of an ESX/ESXi host network adapter (1004089).

  4.

  Verify that the firmware on the RAID controller or HBA is up to date. For more information, see Checking your firmware and BIOS levels to ensure compatibility with ESX/ESXi (1037257).

  5.

  Verify that the local storage or SAN array is configured correctly. For more information, see Slow ESX/ESXi performance caused by misconfigured local storage or SAN array (1006602).

  6.

  Verify on ESX/ESXi 4.1 and above if the storage array devices in the environment support the hardware acceleration functionality and if they are responding correctly to VAAI primitives. If there is no VAAI support on the array cloning or Storage vMotion may fail at 18%. For more information see Cloning or Storage vMotion fails at 18% with the error: Failed to clone: Connection timed out (1029244).

  For further information on VAAI, see:

  1.

  vStorage APIs for Array Integration FAQ (1021976)

  2.

  Disabling the VAAI functionality in ESX/ESXi (1033665)

  Note: If your problem still exists after trying the steps in this article, please:

  1.

  Gather the VMware Support Script Data. For more information, see Collecting diagnostic information for VMware products (1008524).

  2.

  File a support request with VMware Support and note this KB Article ID in the problem description. For more information, see How to Submit a Support Request.

  Link: https://kb.vmware.com/selfservice/microsites/search.do?language=en_USandcmd=displayKCandexternalId=1004002

• Question 117:

  An administrator is attempting to enable Legacy Fault Tolerance (FT) on a virtual machine and observes the following in the vSphere Web Client:

  Fault Tolerance has not been licensed on host .

  What is the minimum licensed edition that supports this configuration?

  A. Standard
  B. Enterprise
  C. Enterprise Plus
  D. Essentials Plus
  A. Standard

  ---

  Licensing

  The number of vCPUs supported by a single fault tolerant VM is limited by the level of licensing that you have purchased for vSphere. Fault Tolerance is supported as follows:

  1.

  vSphere Standard and Enterprise. Allows up to 2 vCPUs

  2.

  vSphere Enterprise Plus. Allows up to 4 vCPUs

  Reference: https://pubs.vmware.com/vsphere-60/index.jsp?topic=%2Fcom.vmware.vsphere.avail.doc%2FGUID-57929CF0-DA9B-407A-BF2E-E7B72708D825.html

• Question 118:

  An administrator is implementing a vSphere 6.x environment containing one vCenter and five ESXi hosts. The administrator has just finished deploying the vCenter Server appliance with an embedded Platform Services Controller (PSC) and needs to ensure that default security certificates within the vSphere 6.x environment are replaced with new certificates.

  What should the administrator do to complete this task the least administrative effort?

  A. Replace the VMCA root certificate before adding the ESXi hosts to vCenter Server.
  B. Create ESXi host security certificates using the SSL. Thumbprint mode to ensure consistency among all hosts.
  C. Add the ESXi hosts to vCenter Server before updating the VMCA root certificate on the PSC.
  D. Make VMCA an Intermediate Certificate Authority to ensure each added ESXi hosts receives the same certificate.
  A. Replace the VMCA root certificate before adding the ESXi hosts to vCenter Server.

  ---

  If you perform a fresh install that includes an external Platform Services Controller, install the Platform Services Controller first and replace the VMCA root certificate. Next, install other services or add ESXi hosts to your environment. If you perform a fresh install with an embedded Platform Services Controller, replace the VMCA root certificate before you add ESXi hosts. If you do, all certificates are signed by the whole chain, and you do not have to generate new certificates. Reference https://docs.vmware.com/en/VMware-vSphere/6.0/com.vmware.vsphere.install.doc/GUID-4469A6D3-048A-471C-9CB4-518A15EA2AC0.html

• Question 119:

  Users are reporting CPU related performance problems on the virtual machine Email-Prod throughout the day.

  The resource settings for the VM and the ESXi host the VM is running on are shown below:

  VM:

  1.

  Email-Prod

  2.

  vCPUs: 4

  3.

  Memory: 96GB

  ESXi host:

  1.

  CPU: 2 x 8 Core Processors

  2.

  Memory: 128GB

  3.

  NUMA architecturE. 2 Nodes

  Which two options would alleviate the observed performance problem for Email-Prod? (Choose two.)

  A. Enable the advanced parameter Numa.PageMigEnable.
  B. Enable the advanced parameter Numa.AutoMemAffinity.
  C. Enable CPU affinity to separate 2 vCPUs for each NUMA node.
  D. Enable CPU affinity to bind all vCPUs to one NUMA node.
  B. Enable the advanced parameter Numa.AutoMemAffinity.
  C. Enable CPU affinity to separate 2 vCPUs for each NUMA node.

  ---

  B-) Memory You can change the amount of RAM that a VM will use like this memsize = "128" If you don't assign a value for memory VMware will use the default-setting which is 32MB memsize = "32"

  Whenever you assign RAM manually make sure the value is a multiple of 4 - otherwise the VM will not start:

  memsize = "255"

  causes this error-message:

  Memory size 255 not a multiple of 4

  https://pubs.vmware.com/vsphere-60/index.jsp#com.vmware.vsphere.hostclient.doc/GUID-99E66B59-53A8-42D0-A08F-17DBE7D4A864.html?resultof=%2522

  C-) This is expected behavior based on the current architecture of the scheduler. However, these points help to limit the impact of the issue :Lower the number of vCPUs. From the example above, you would lower the number of vCPUs from

  8 to 6 or less. If the virtual machines are sized such that they are a whole multiple or divisor of the NUMA node size, this helps with the number of virtual machines that you can power on. If 6 vCPU virtual machines are used, you can run up to

  at least 8 of those virtual machines (with 100% CPU utilization) without incurring substantial ready times.

  https://www.vmware.com/files/pdf/.../VMware-PerfBest-Practices-vSphere6-0.pdf

• Question 120:

  Refer to the Exhibit.

  

  A vSphere 6.x environment is configured with VMware Virtual Volumes (VVOLs). An administrator accesses the cluster Actions menu, as shown in the Exhibit. Which option is used to create a VVOL on an existing VVOL container?

  A. Storage
  B. Deploy OVF Template
  C. New vApp
  D. Settings
  A. Storage

  ---

  Virtual Volumes is an integration and management framework for external storage that provides finer control at the VM-level, streamlines storage operation and offers flexibility of choice.

  Virtual Volumes implements the core tenets of the VMware SDS vision to enable a fundamentally more efficient operational model for storage in virtualized environments, centering it around the VM rather than on the physical infrastructure. See more at: http://www.vmware.com/in/products/vsphere/features/virtual-volumes#sthash.tx9IZaOq.dpuf