VMware 2V0-621 Online Practice Questions and Exam Preparation

VMware 2V0-621 Online Questions & Answers

• Question 161:

  During a vCenter Server upgrade, an ESXi 6.x host in a High Availability (HA) cluster fails.

  Which statement is true?

  A. HA will fail the virtual machines over to an available host during the vCenter Server upgrade process.
  B. HA is unavailable during the vCenter Server upgrade process.
  C. HA will fail the virtual machines over to an available host after the vCenter Server upgrade completes.
  D. HA will successfully vMotion the virtual machines during the host failure.
  A. HA will fail the virtual machines over to an available host during the vCenter Server upgrade process.

  ---

  During a vCenter Upgrade the VMware HA Agent on all of the ESXi hosts will be updated. ... it's very likely that the HA agent will fail to initialize the first time when the host restarts. During a vCenter Upgrade the VMware HA Agent on all of the ESXi hosts will be updated. After this happens the "require reboot" flag is set on the hosts, as explained in VMware KB 2034945.

• Question 162:

  VMware vSphere Replication protects virtual machines from partial or complete site failures by replicating the virtual machines between which three sites? (Choose three.)

  A. From a source site to a target site.
  B. From within a single site from one cluster to another.
  C. From multiple source sites to a shared remote target site.
  D. From a single source site to multiple remote target sites.
  E. From multiple source sites to multiple remote target sites.
  A. From a source site to a target site.
  B. From within a single site from one cluster to another.
  C. From multiple source sites to a shared remote target site.

  ---

  Overview of VMware vSphere Replication VMware vSphere Replication is an extension to VMware vCenter Server that provides hypervisor-based virtual machine replication and recovery. vSphere Replication is an alternative to storage-based replication. It protects virtual machines from partial or complete site failures by replicating the virtual machines between the following sites:

  1.

  From a source site to a target site

  2.

  Within a single site from one cluster to another

  3.

  From multiple source sites to a shared remote target site

  Reference: https://pubs.vmware.com/vsphere55/index.jsp?topic=%2Fcom.vmware.vsphere.replication_admin.doc%2FGUID-C987AD18-7C2D-4FA6-B6E4-6B0DDA915A7A.html

• Question 163:

  An administrator has configured a cluster with the Host Failures Cluster Tolerates admission control policy, as shown in the Exhibit:

  

  Based on the exhibit, which two statements are true? (Choose two.)

  A. The cluster can sustain the loss of two nodes.
  B. The number of slots per cluster node is four.
  C. The number of slots per cluster node is three.
  D. The cluster can sustain loss of only one node.
  C. The number of slots per cluster node is three.
  D. The cluster can sustain loss of only one node.

• Question 164:

  An administrator is configuring the clock tolerance for the Single Sign-On token configuration policy and wants to define the time skew tolerance between a client and the domain controller clock. Which time measurement is used for the value?

  A. Milliseconds
  B. Seconds
  C. Minutes
  D. Hours
  A. Milliseconds

  ---

  Time difference, in milliseconds, that vCenter Single Sign-On tolerates between a client clock and the domain controller clock. If the time difference is greater than the specified value, vCenter Single Sign-On declares the token invalid.

  Reference: https://pubs.vmware.com/vsphere-55/index.jsp?topic=%2Fcom.vmware.vsphere.security.doc%2FGUID-50F2D815-4F67-4267-A005-B8158DADCBC9.html

• Question 165:

  Refer to the Exhibit.

  

  An administrator is troubleshooting a CPU performance related problem for the SlowVM virtual machine.

  Which three actions should the administrator take to improve CPU performance for SlowVM? (Choose three.)

  A. Increase the number of vCPUs assigned to SlowVM.
  B. Decrease the number of vCPUs assigned to SlowVM.
  C. Power off other VMs running on the same ESXi host.
  D. Increase the CPU limit for SlowVM.
  E. Move SlowVM to another ESXi host with more physical CPU resources available.
  B. Decrease the number of vCPUs assigned to SlowVM.
  C. Power off other VMs running on the same ESXi host.
  E. Move SlowVM to another ESXi host with more physical CPU resources available.

  ---

  CPU Performance Enhancement Advice

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

  2 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.

  3 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. 4 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.

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

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

  6 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.

  7 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.

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

  9 Use the newest version of ESX/ESXi, and enable CPU-saving features such as TCP Segmentation Offload, large memory pages, and jumbo frames.

  Reference:

  https://pubs.vmware.com/vsphere-4-esx-vcenter/index.jsp?topic=/com.vmware.vsphere.dcadmin.doc_41/vsp_dc_admin_guide/performance_statistics/c_troubleshoot_cpu.html

• Question 166:

  An administrator tries to capture network traffic for a virtual machine, but cannot see the expected traffic in the packet capture tool.

  Which step can resolve the problem?

  A. Migrate the virtual machine to a Distributed Virtual Switch.
  B. Enable Promiscous Mode on the relevant port group.
  C. Modify the default value of MAC Address changes.
  D. Enable Forged Transmits on the virtual machine.
  B. Enable Promiscous Mode on the relevant port group.

  ---

  When promiscuous mode is enabled at the portgroup level, objects defined within that portgroup have the option of receiving all incoming traffic on the vSwitch. Interfaces and virtual machines within the portgroup will be able to see all traffic passing on the vSwitch, but all other portgroups within the same virtual switch do not.

  Reference: https://kb.vmware.com/selfservice/microsites/search.do?language=en_USandcmd=displayKCandexternalId=1002934

• Question 167:

  Which Platform Service Controller Password Policy determines the number of days a password can exist before the user must change it?

  A. Maximum Lifetime
  B. Password Age
  C. Maximum Days
  D. Password Lifetime
  A. Maximum Lifetime

  ---

  Configure SSO policies

  Password Policy: You can configure the following parameters:

  -Description ?Password policy description. Required.

  -

  Maximum lifetime ?Maximum number of days that a password can exist before it has to be changed.

  -

  Restrict re-use ?Number of the user's previous passwords that cannot be set again.

  -

  Maximum length ?Maximum number of characters that are allowed in the password.

  -

  Minimum length ?Minimum number of characters required in the password.

  -

  Character requirements ?Minimum number of different character types required in the password.

  -

  Identical adjacent characters ?Maximum number of identical adjacent characters allowed in the password.

  Reference: http://davidstamen.com/certification/section-1-configure-and-administer-vsphere-6x-security/

• Question 168:

  An administrator is upgrading vCenter Server and sees this error:

  The DB User entered does not have the required permissions needed to install and configure vCenter Server with the selected DB. Please correct the following error(s): %s

  Which two statements explain this error? (Choose two.)

  A. The database is set to an unsupported compatibility mode.
  B. The permissions for the database are incorrect.
  C. The permissions for vCenter Server are incorrect.
  D. The database server service has stopped.
  A. The database is set to an unsupported compatibility mode.
  B. The permissions for the database are incorrect.

  ---

  Cause

  This issue occurs when the vCenter Server instance being upgraded is connected to a SQL server which was upgraded and the vCenter Server database compatibility level is not changed to match the SQL server version.

  Resolution

  To resolve this issue, change the database compatibility level to match the SQL Servers level.

  To change the database compatibility level:

  Right-click the vCenter Server database and click Properties.

  Click Options.

  Change the compatibility level that matches the SQL server version.

  Using the vSphere Command Line Interface (CLI), you can upgrade ESXi 5.x hosts to version 6.0.

  For more information about upgrading ESXi 5.x hosts using esxcli commands, see the Upgrading Hosts by Using esxcli Commands

  Reference: https://kb.vmware.com/selfservice/microsites/search.do?language=en_USandcmd=displayKCandexternalId=2006904

• Question 169:

  Which two statements are true regarding Storage Multipathing Plug-Ins? (Choose two.)

  A. The default Path Selection Policy is VMW_PSP_MRU for iSCSI or FC devices.
  B. The default Path Selection Policy is VMW_PSP_FIXED for iSCSI or FC devices.
  C. VMW_PSP_MRU is typically selected for ALUA arrays by default.
  D. VMW_PSP_FIXED is typically selected for ALUA arrays by default.
  B. The default Path Selection Policy is VMW_PSP_FIXED for iSCSI or FC devices.
  C. VMW_PSP_MRU is typically selected for ALUA arrays by default.

  ---

  : By default, the VMware NMP supports the following PSPs:

  VMW_PSP_MRU The host selects the path that it used most recently. When the path becomes unavailable, the host selects an alternative path. The host does not revert back to the original path when that path becomes available again. There is no preferred path setting with the MRU policy. MRU is the default policy for most active-passive storage devices. Displayed in the vSphere Client as the Most Recently Used (VMware) path selection policy. VMW_PSP_FIXED The host uses the designated preferred path, if it has been configured. Otherwise, it selects the first working path discovered at system boot time. If you want the host to use a particular preferred path, specify it manually. Fixed is the default policy for most active-active storage devices. Note If the host uses a default preferred path and the path's status turns to Dead, a new path is selected as preferred. However, if you explicitly designate the preferred path, it will remain preferred even when it becomes inaccessible.

  Reference: https://pubs.vmware.com/vsphere-51/index.jsp?topic=%2Fcom.vmware.vsphere.storage.doc%2FGUID-B7AD0CA0-CBE2-4DB4-A22C-AD323226A257.html

• Question 170:

  What are three reasons why a virtual machine might fail to power on? (Choose three.)

  A. The virtual machine is running on an ESXi host which has an expired license.
  B. The virtual machine is running on a datastore which has insufficient disk space for the .vswp file.
  C. The virtual machine is in a cluster with vSphere HA Admission control enabled.
  D. The virtual machine has a disconnected network adapter.
  E. The virtual machine does not have a Virtual Hard Disk assigned.
  A. The virtual machine is running on an ESXi host which has an expired license.
  B. The virtual machine is running on a datastore which has insufficient disk space for the .vswp file.
  C. The virtual machine is in a cluster with vSphere HA Admission control enabled.

  ---

  When a virtual machine fails to power on, a reason may be logged to the vmware.log file for the virtual machine, to the management agent logs, or presented in the client. Review any messages and consider these points:

  1.

  The virtual machine monitor may be asking a question to be answered during startup. A virtual machine may pause the power-on task at 95% to obtain additional information from the administrator. For more information, see Powering on a virtual machine pauses at 95% while waiting for a question to be answered (1027096).

  2.

  Creating a new power-on task may fail if another task for the virtual machine or other component is already in progress, and multiple concurrent tasks on the object are not permitted. For more information, see:

  1.

  Collecting information about tasks in VMware ESX and ESXi (1013003)

  2.

  vCenter operation times out with the error: Operation failed since another task is in progress (1004790).

  3.

  A virtual machine may fail to power on if licensing requirements are not met. For more information, see:

  1.

  Cannot Power on Virtual Machines, "Not enough licenses installed to perform the operation" Error Message (7114568)

  2.

  The Managing ESX/ESXi and vCenter Server Licenses section of the Datacenter Administration Guide for vSphere 4 or higher

  3.

  The VirtualCenter and ESX Server Licensing Overview section of the Installation Guide for VMware Infrastructure 3

  4.

  The virtual machine may be configured to reserve physical memory on the host, but the host memory is over-committed and the required memory is unavailable. For more information, see:

  1.

  Virtual machine does not power on when there is high CPU reservation (1001637)

  2.

  Powering on a virtual machine fails with the error: memoryAllocation.reservation (1036914).

  5. The virtual machine may be starting in a VMware High Availability cluster with strict admission control enabled, and there are insufficient resources to guarantee failover for all virtual machines. For more information, see:

  1.

  Implications of enabling or disabling VMware HA strict admission control when using DRS and VMware DPM (1007006)

  2.

  Diagnosing insufficient fail over capacity on a VMware High Availability Cluster (1003717)

  3.

  Automating High Availability (HA) Services with VMware HA whitepaper

  6.

  A file required for starting the virtual machine, such as a virtual disk or swap file, may be unavailable or missing. For more information, see Investigating virtual machine file locks in ESX/ESXi (10051).

  7.

  The virtual machine may have been previously suspended and making use of CPU features which are unavailable or incompatible with the CPU features available on this host. The virtual machine cannot be started without the required features. For more information, see:

  1.

  Powering on a virtual machine from a suspend state or reverting to a snapshot fails (1038218)

  2.

  Virtual machines fail to power on due to a suspend state from an incompatible CPU type (1000241)

  3.

  To retain the suspended state, move the virtual machine back to the host it was originally suspended on and power-on the virtual machine there.

  4.

  To discard the suspend state, and power on the virtual machine in a crash-consistent manner, see Unable to power on a suspended virtual machine using vSphere Client (1004606).

  8.

  The virtual machine may require both a VT-capable CPU and the VT feature to be enabled in the host system's BIOS. This is true for all 64-bit virtual machines. If the VT feature is unavailable, the virtual machine may produce the message msg.cpuid.noLongmode. For more information, see Enabling VT on Intel EM64T Systems for ESX Server 3 (3282933).

  9.

  The virtual machine may require another CPU feature which is unavailable on this host. The virtual machine may produce a message similar to msg.cpuid., identifying the specific feature it has been configured to require. Move the virtual machine back to the host which has the required CPU features, or edit the virtual machine's configuration to remove the requirement.

  10.

  The virtual machine may start, but quickly fail with an error during startup. Review the contents of the vmware.log file in the virtual machine's directory for any errors or warnings, and search the Knowledge Base for the error or warning. Base your troubleshooting on the specific messages seen in the logs. For more information, see:

  1.

  Determining why a virtual machine was powered off or restarted (1019064)

  2.

  Interpreting virtual machine monitor and executable failures (1019471)

  11.

  If the virtual machine does successfully power on, but the guest OS doesn't start correctly, there may be an incompatibility between the virtual hardware and drivers within the guest OS. For example, a missing SCSI driver may be required for booting. For more information, see Windows virtual machine configured to use a BusLogic SCSI controller reports that the operating system does not support the controller (2007603).

  12.

  If the guest OS, or a driver or application within the virtual machine experiences a problem during startup, the guest OS may become unresponsive. Continue troubleshooting. For more information, see Troubleshooting unresponsive guest operating system issues (1007818).

  Reference: https://kb.vmware.com/selfservice/microsites/search.do?language=en_USandcmd=displayKCandexternalId=2001005