VMware 2V0-621 Online Practice Questions and Exam Preparation

VMware 2V0-621 Online Questions & Answers

• Question 61:

  Attempting to update an ESXi 6.x host using the following command:

  esxcli software vib update -d update.zip

  Generates the following error:

  Could not download from depot at /tmp/index.xml, skipping (('/tmp/index.xml', '', "[Errno 4] IOError: ")) url = /tmp/index.xml

  What action should be taken to correct the problem?

  A. Add the full file path to the command.
  B. Use the update option instead of install.
  C. Use the switch -d instead of -v.
  D. Replace esxcli with esxupdate.
  A. Add the full file path to the command.

  ---

  Put the full path to the .zip even if you're in the same directory ex: esxcli software vib install -d /tmp/ESXi600-201504001.zip Also make sure you're in maintenance mode How to perform next/related steps: Check:----https://pubs.vmware.com/vsphere-60/index.jsp#com.vmware.vsphere.upgrade.doc/GUID-22A4B153-CB21-47B4-974E-2E5BB8AC6874.html?resultof=%2522

• Question 62:

  Refer to the Exhibit.

  

  A vSphere 6.x DRS cluster is configured as shown in the Exhibit.

  Based on the exhibit, which statement is true?

  A. A virtual machine can be powered on in the Web Resource Pool with a 3 GHz CPU Reservation.
  B. A virtual machine can be powered on in the Web Resource Pool with a 4 GHz CPU Reservation.
  C. A virtual machine can be powered on in the DB Resource Pool with a 3 GHz CPU Reservation.
  D. A virtual machine can be powered on in the DB Resource Pool with a 4 GHz CPU Reservation.
  C. A virtual machine can be powered on in the DB Resource Pool with a 3 GHz CPU Reservation.

  ---

  Scaling out (not up) your VMs ie: Don't have one 8 vCPU SQL DB server, use 4 smaller 2vCPU VMs

  If there is resource contention, RP-QA receives 4GHz and 2GB of memory, and RP-Marketing 2GHz and 1GB.

  Otherwise, they can receive more than this allotment. Those resources are then available to the virtual machines in the respective resource pools.

  So now you know better than to use reservations to solve CPU contention.

  https://pubs.vmware.com/vsphere-6.0

• Question 63:

  Which two methods are recommended for managing the VMware Directory Service? (Choose two.)

  A. Utilize the vmdir command.
  B. Manage through the vSphere Web Client.
  C. Manage using the VMware Directory Service.
  D. Utilize the dc rep command.
  A. Utilize the vmdir command.
  B. Manage through the vSphere Web Client.

  ---

  A) dir-cli Command Reference

  The dir-cli utility allows you to create and update solution users, create other user accounts, and manage certificates and passwords in vmdir. ( link: to see vmdir commands-- https://pubs.vmware.com/vsphere-60/index.jsp?topic=%

  2Fcom.vmware.vsphere.security.doc%2FGUID-4FBEA58E-9492-409B-B584-C18477F041D8.html )

  B) Directory service associated with the vsphere.local domain. This service is a multi-tenanted, multi-mastered directory service that makes an LDAP directory available on port 11711. In multisite mode, an update of VMware Directory Service

  content in one VMware Directory Service instance results in the automatic update of the VMware Directory Service instances associated with all other vCenter Single Sign-On nodes via Vsphere Web Client.

• Question 64:

  An administrator wants to prevent a priority virtual machine that resides in a vSphere DRS cluster from migrating to other hosts in the cluster. What configuration step will accomplish this without affecting other virtual machines?

  A. Set VM Overrides to Partially Automated for this virtual machine.
  B. Configure a Virtual Machines to Hosts rule with the setting Must run on hosts in group.
  C. Configure a Virtual Machines to Hosts rule with the setting Should run on hosts in group.
  D. Set VM Overrides to Manual for this virtual machine.
  D. Set VM Overrides to Manual for this virtual machine.

• Question 65:

  When troubleshooting a performance related issue, an administrator sees the following warning message on an ESXi Console:

  Significant imbalance between NUMA nodes detected. Performance may be impacted.

  Which action should the administrator take to correct this problem?

  A. Ensure that the RAM modules are evenly balanced between processor sockets in the physical server.
  B. Ensure that all memory banks associated with CPU Socket 0 in the physical server are completely filled.
  C. Ensure that the physical server has the maximum amount of RAM modules that it can support.
  D. Ensure that all RAM modules in the host are Error-correcting code (ECC) modules.
  A. Ensure that the RAM modules are evenly balanced between processor sockets in the physical server.

  ---

  This message displays when memory is not evenly distributed between processor sockets.

  Each CPU socket has its own RAM slots. To resolve this issue, evenly balance RAM modules between processor sockets. That is, ensure that each bank of RAM slots has the same amount of RAM.

  For example, if CPU socket 1 has a total of 8 GB of RAM, ensure that CPU socket 2 also has 8 GB of RAM.

  Ensure that memory on the nodes are balanced. For more information and assistance, contact your vendor.

  Note: Damaged or faulty physical RAM modules can also cause this issue.

  Reference:

  https://kb.vmware.com/selfservice/microsites/search.do?language=en_USandcmd=displayKCandexternalId=1018754

• Question 66:

  An administrator is unable to patch an ESXi 6.x host using VMware Update Manager.

  What is an alternative option for patching a host?

  A. Upload the offline bundle to a datastore and execute the command esxcli software vib install -d to apply it manually.
  B. Upload the vib to a datastore and execute the command esxcli software vib install -d to apply it manually.
  C. Upload the offline bundle to a datastore and execute the command esxupdate install -v to apply it manually.
  D. Upload the vib to a datastore and execute the command esxupdate install -v to apply it manually.
  A. Upload the offline bundle to a datastore and execute the command esxcli software vib install -d to apply it manually.

  ---

  Update a Host with Individual VIBs You can update a host with VIBs stored in a software depot that is accessible through a URL or in an offline ZIP depot. Important If you are updating ESXi from a zip bundle in a VMware-supplied depot, either online from the VMware Web site or downloaded locally, VMware supports only the update method specified for VMware-supplied depots in the topic Upgrade or Update a Host with Image Profiles. The esxcli software vib update and esxcli software vib install commands are not supported for upgrade operations. See Differences Between vSphere Upgrades and Updates and Upgrade or Update a Host with Image Profiles

  Reference: https://pubs.vmware.com/vsphere-60/index.jsp?topic=%2Fcom.vmware.vsphere.upgrade.doc%2FGUID-1E773360-CB1C-4BC2-B2A4-B73AB5706FAF.html

• Question 67:

  An administrator runs the command esxcli storage core device list and sees the following output: mpx.vmhba1:C0:T0:L0 Display Name: RAID 5 (mpx.vmhba1:C0:T0:L0) Has Settable Display Name: false SizE. 40960 Device Type: Direct-Access Multipath Plugin: NMP Devfs Path: /vmfs/devices/disks/mpx.vmhba1:C0:T0:L0 Status: off Is Local: true

  What can be determined by this output?

  A. The device is a being used for vFlash Read Cache.
  B. The device is in a Permanent Device Loss (PDL) state.
  C. The device is a local Solid State Device (SSD).
  D. The device is in an All Paths Down (APD) state.
  B. The device is in a Permanent Device Loss (PDL) state.

  ---

  Reference: https://kb.vmware.com/selfservice/microsites/search.do?language=en_USandcmd=displayKCandexternalId=2004684

• Question 68:

  What are two limitations of Link Aggregation Control Protocol (LACP) on a vSphere Distributed Switch? (Choose two.)

  A. IP Hash load balancing is not a supported Teaming Policy.
  B. Software iSCSI multipathing is not compatible.
  C. Link Status Network failover detection must be disabled.
  D. It does not support configuration through Host Profiles.
  B. Software iSCSI multipathing is not compatible.
  D. It does not support configuration through Host Profiles.

  ---

  LACP Limitations on a vSphere Distributed Switch Link Aggregation Control Protocol (LACP) on a vSphere distributed switch allows network devices to negotiate automatic bundling of links by sending LACP packets to a peer. However, there are some limitations when using LACP with a vSphere distributed switch.

  1.

  LACP only works with IP Hash load balancing and Link Status Network failover detection.

  2.

  LACP is not compatible with iSCSI software multipathing.

  3.

  vSphere only supports one LACP group per distributed switch, and only one LACP group per host.

  4.

  LACP settings do not exist in host profiles.

  5.

  LACP between two nested ESXi hosts is not possible.

  6.

  LACP does not work with port mirroring.

  Reference: https://pubs.vmware.com/vsphere-51/index.jsp?topic=%2Fcom.vmware.vsphere.networking.doc%2FGUID-3FDE1E96-9217-4FE6-8B76-6E3A64766828.html

• Question 69:

  Refer to the Exhibit.

  

  An administrator has configured a vSphere 6.x DRS cluster as shown in the Exhibit.

  Based on the exhibit, which statement is true?

  A. A virtual machine can be powered on in the Test Resource Pool with a 6 GB Memory Reservation.
  B. A virtual machine can be powered on in the Dev Resource Pool with a 8 GB Memory Reservation.
  C. A virtual machine from both the Test Resource Pool and the Dev Resource Pool can be powered on with a 4 GB Memory Reservation.
  D. No more virtual machines can be powered on due to insufficient resources.
  A. A virtual machine can be powered on in the Test Resource Pool with a 6 GB Memory Reservation.

  ---

  A virtual machine can be powered on in the Test Resource Pool with a 6 GB Memory Reservation because: Total is 8GB

  1Gb used by test resource pool VM which is powered on and 2gb by Test dev pool VM powered on hence distribution is less and expandable memory quota is more/left.

  To understand limits and theory check the information given below:

  Memory Maximums

  The ESXi host maximums represents the limits for ESXi host memory.

  Table 3-2. ESXi Host Memory Maximums

  Item Maximum

  RAM per host 6 TB

  12 TB is supported on specific OEM certified platform. See VMware Hardware

  Compatibility Limits for guidance on the platforms that support vSphere 6.0

  with 12 TB of physical memory.

  Number of swap files 1 per virtual machine

  And,

  Resource Pool

  Resource pools per host 1600

  Children per resource pool 1100

  Resource pool tree depth 8

  Additional 4 resource pools are used by system internals.

  Resource pools per cluster 1600

  Configuration Maximums - vSphere 6.0 - VMware

  https://www.vmware.com/pdf/vsphere6/r60/vsphere-60-configuration-maximums.pdf

• Question 70:

  An administrator has a virtual machine configured with the following settings:

  1.

  ESXi version: 5.1

  2.

  CPU: vCPUs 6

  3.

  Memory: 48GB

  4.

  Hardware version: 7

  5.

  VMware Tools: Installed

  Which two actions must the administrator take in order to utilize vNUMA? (Choose two.)

  A. Upgrade the ESXi host to vSphere 5.5 or later.
  B. Upgrade to Virtual Hardware version 8.
  C. Configure numa.vcpu.min to 5
  D. Configure numa.vcpu.min to 6
  B. Upgrade to Virtual Hardware version 8.
  D. Configure numa.vcpu.min to 6

  ---

  Using Virtual NUMA

  vSphere 5.0 and later includes support for exposing virtual NUMA topology to guest operating systems, which can improve performance by facilitating guest operating system and application NUMA optimizations. Virtual NUMA topology is

  available to hardware version 8 virtual machines and is enabled by default when the number of virtual CPUs is greater than eight. You can also manually influence virtual NUMA topology using advanced configuration options.

  You can affect the virtual NUMA topology with two settings in the vSphere Client: number of virtual sockets and number of cores per socket for a virtual machine. If the number of cores per socket (cpuid.coresPerSocket) is greater than one,

  and the number of virtual cores in the virtual machine is greater than 8, the virtual NUMA node size matches the virtual socket size. If the number of cores per socket is less than or equal to one, virtual NUMA nodes are created to match the

  topology of the first physical host where the virtual machine is powered on.

  Reference:

  https://pubs.vmware.com/vsphere-51/index.jsp#com.vmware.vsphere.resmgmt.doc/GUID-17B629DE-75DF-4C23-B831-08107007FBB9.html

  --------------note----------------------Also, Check Page 21,22 https://www.vmware.com/pdf/Perf_Best_Practices_vSphere5.1.pdf

  D-) Size your virtual machines so they align with physical NUMA boundaries. For example, if you have a host system with six cores per NUMA node, size your virtual machines with a multiple of six vCPUs (i.e., 6 vCPUs, 12 vCPUs, 18

  vCPUs, 24 vCPUs, and so on). Hence answer is D

  Also, Check Page 41,42 https://www.vmware.com/pdf/Perf_Best_Practices_vSphere5.1.pdf