Question 1

Sarah, a VMware administrator, has received multiple reports that several servers on a particular host are having errors. She logs onto the servers in question but can find little information from the operating system event logs. Sarah suspects there may be a hardware issue on the host. Which of the following is a good next step in Sarah's investigation?
A)Sarah will have to power off the host and reboot it, checking the bios for any errors.
B)Sarah cannot check for hardware errors; she will have to migrate the virtual machines to another host and replace the faulty host.
C)Sarah can check the vCenter Hardware Status tab on the host in question.
D)Sarah can check the vCenter service status.

Accepted Answer

To check for suspected hardware errors on a host, Sarah can check the vCenter Hardware Status tab on the host in question. This plugs into the CIM module on the hardware and reports the status of hardware components such as CPU and memory.

Question 2

Sarah, a VMware administrator, is receiving repeated reports that several servers on one host are having errors. She logs onto the servers in question but can find little information from the operating system event logs. She wishes to place a support call with VMware and have the support team find the fault. What could she do in order to expedite the VMware support team's efforts?
A)She could migrate all the virtual machines onto as few hosts as possible.
B)She could take screenshots of every configuration item on all servers.
C)She could export the system logs.
D)She could reboot all hosts in the vCenter system.

Accepted Answer

In order to expedite the VMware support team's efforts when investigating a fault it is possible to export the vCenter system logs to a bundle. This is done from the vSPhere client by selecting File > Export > Export System Logs.

Question 3

John, a VMware administrator, has set a virtual machine as fault tolerant using VMware Fault Tolerance. The fault-tolerant pair of virtual machines has been working as expected for several weeks, but John is now receiving errors relating to the fault-tolerant pair. What is a likely cause of these error messages?
A)The hosts are at the same patch level.
B)There are only four identical hosts in the vSphere cluster.
C)The virtual machines only have one vCPU.
D)There is increased bandwidth on the physical network.

Accepted Answer

A likely cause of fault-tolerance-related errors in this scenario is that there has been an increased amount of bandwidth on the physical network. If there is not sufficient bandwidth on the physical network, then the lockstep logging is unable to keep up with the virtual machine transactions, and this induces errors. In this situation, you should isolate the FT network or reduce the load on the physical network.

Question 4

John, a VMware administrator, has set a virtual machine as fault tolerant using VMware Fault Tolerance. The fault-tolerant pair of virtual machines worked as expected for several weeks, but for the past two days the fault tolerant pair has been failing over repeatedly. Though there hasn't been an outage, John is concerned. What is a likely cause of the repeated failover?
A)There has been an increased level of VMFS activity.
B)The hosts are at the same patch level.
C)There are only four identical hosts in the vSphere cluster.
D)The virtual machines only have one vCPU.

Accepted Answer

A likely cause of fault-tolerance-related errors in this scenario is that there has been an increased level of VMFS activity. When virtual machines power on or off - for example, during a vMotion or when snapshoting takes place - the VMFS volume in question has an increased level of locking. This can cause fault-tolerant machines to failover as the VMkernel receives warning about SCSI reservations. To resolve this, you could place fault-tolerant machines on less densely populated VMFS volumes.

Question 5

Which option below best describes the vSphere command line utility vmkping?
A)vmkping is used to reboot hosts.
B)vmkping is used to test VMkernel connectivity.
C)vmkping is used to reboot the VMkernel.
D)vmkping is used to test virtual machine connectivity.

Accepted Answer

vmkping is a command line utility used to test VMkernel connectivity. It issues a ping command from the VMkernel when you type, vmkping <server>.

Question 6

What is the correct setting of a host network adapter with regards to speed and duplex?
A)100 Mbps, full
B)100 Mbps, half
C)1 Gb, full
D)Auto-negotiate

Accepted Answer

The correct speed and duplex setting for a network card is auto-negotiate. This ensures there is no mismatch between a physical network port and the physical network card of an ESX/i host.

Question 7

Where can you check the configuration of a vSphere Distributed Switch using the vSphere client?
A)From the hosts configuration section
B)From the main network view
C)From the VMs and Templates view.
D)From the Datastores view.

Accepted Answer

You can check the configuration of a vSphere Distributed Switch using the vSphere client by going to the main network view from the home view. You can only check the vStandard switch configuration form the host's networking configuration section.

Question 8

You can manually specify a MAC address for a virtual machine network card.

Accepted Answer

You can manually specify a MAC address for a virtual machine network card. This is useful for situations that require a manual configuration, for example when using network sniffers or software packages that are licensed to a specific MAC address.

Question 9

What vSphere item can be used for troubleshooting storage latency with the vsphere client?
A)vSphere Storage Latency plugin
B)vSphere Storage Evaluator
C)The performance tab of the ESX host
D)The performance tab of the vCenter server

Accepted Answer

In order to troubleshoot storage performance issues, you could access the ESX host performance tab. This tab provides valuable information relating to all aspects of ESX/i performance and should be the first place checked. In this situation, you could also use SAN-based tools to analyse SAN performance.

Question 10

Which ESX command line tool can be used to troubleshoot performance-related issues for all aspects of ESX?
A)esxperf
B)esxtop
C)esxanalyse
D)esxtroubleshoot

Accepted Answer

esxtop is a command line utility that allows you to troubleshoot and analyze all aspects of ESX host performance. For ESX/i hosts, you can use the vMA or esxcli.

Question 11

What is the MTU required for ISCSI storage networking on vSphere to enable Jumbo Frames?
A)1500
B)1700
C)6000
D)9000

Accepted Answer

The MTU required for ISCSI storage networking on vSphere to enable Jumbo Frames is 9000. This MTU needs to be configured end to end; that is, every link in the networking chain must have this MTU.

Question 12

What is one of the main advantages of enabling Jumbo Frames on an ISCSI storage network?
A)The network cards will have an increased life span.
B)With Jumbo Frames enabled, the maximum number machines per ESX host doubles.
C)The CPU of the ESX host will be utilized less.
D)The failover times are reduced.

Accepted Answer

One of the main advantages of enabling Jumbo Frames on an ISCSI storage network is the CPU of the ESX host will be utilized less. This can increase the consolidation ratio, since the CPU will have more free cycles.

Question 13

What is a requirement of an HA/DRS cluster?
A)The virtual machines must only have one CPU.
B)The hosts CPUs must be compatible.
C)The virtual machines must not have more than 2 GB of memory.
D)The hosts must have 6 or more NICs.

Accepted Answer

In order for an HA/DRS cluster to function, the hosts must have compatible CPUs. Otherwise, the virtual machine may encounter different CPU instruction sets during live migration.

Question 14

HA and DRS will not work if two hosts in a cluster have CPUs that are from the same family but of different speeds.

Accepted Answer

HA and DRS will work if two hosts in a cluster have CPUs from the same family but of different speeds. The CPUs can have differing instruction sets also, as these can be masked at the cluster level using Enhanced vMotion Compatability (EVC).

Question 15

Of the following options, which are requirements of an HA/DRS cluster? Pick two.
A)Hosts must be connected to vCenter.
B)Hosts must have more than four logical CPUs.
C)Hosts must have more than 16 GB of RAM.
D)Hosts must have gigabit network cards.

Accepted Answer

In order for hosts to participate in an HA/DRS cluster, they must be connected to vCenter and have gigabit network cards. There are other requirements; for example, the hosts must have shared storage for the virtual machines to reside on.

Question 16

John, a VMware administrator, is experiencing strange errors with an HA/DRS cluster. Which of the following is a likely cause of HA/DRS cluster errors?
A)DNS is not functioning correctly.
B)WINS is not functioning correctly.
C)The static WINS files on the ESX hosts are out of date.

Accepted Answer

In order for a HA/DRS cluster to operate correctly, you must have a functional DNS environment. If DNS is not working as expected, you will have errors in all aspects of vSphere, as DNS is a core requirement for most features.

Question 17

John, a VMware administrator, is trying to modify an alarm for a virtual machine, but he is unable to do so. Which of the following options is a possible reason for this failure?
A)Alarms for virtual machines cannot be altered.
B)The alarm was created at a higher level in the inventory.
C)Alarms for virtual machines can only be deleted.
D)John is not in the VMs and Templates view.

Accepted Answer

It is likely that John is unable to alter the alarm because the alarm was created at a higher level in the inventory. vSphere has numerous alarms created at the root level by default, and these can only be altered at this level.

Question 18

Which of the following are options for a triggered alarm? Select two.
A)Send a notification trap.
B)Send a text message.
C)Reboot the vCenter Server.
D)Send a notification email.

Accepted Answer

Two possible actions for a triggered alarm are to send a notification trap and send a notification email. Other actions include rebooting or shutting down a host. Triggered actions are altered on specific alerts dependant on the nature of the alert.

Question 19

Of the following options, which can be monitored by vCenter? Select three.
A)Virtual machines
B)Hosts
C)Clusters
D)Physical switches

Accepted Answer

Virtual machines, hosts and clusters can all have alarms defined for them. Physical switches are not part of the virtual environment and cannot be monitored by vCenter. In order to monitor a physical switch, one must employ third-party tools.

Question 20

Of the following two choices, which is considered worse?
A)Memory ballooning
B)Memory swapping

Accepted Answer

Memory swapping is considerably worse than ballooning. If swapping is occurring, it is because there is a serious contention on memory recourses. It suggests that you should balance resources more effectively or add more hosts to the cluster.

Quiz 6: Troubleshooting

Which option below best describes the vSphere command line utility vmkping?

What is the correct setting of a host network adapter with regards to speed and duplex?

Where can you check the configuration of a vSphere Distributed Switch using the vSphere client?

You can manually specify a MAC address for a virtual machine network card.

What vSphere item can be used for troubleshooting storage latency with the vsphere client?

Which ESX command line tool can be used to troubleshoot performance-related issues for all aspects of ESX?

What is the MTU required for ISCSI storage networking on vSphere to enable Jumbo Frames?

What is one of the main advantages of enabling Jumbo Frames on an ISCSI storage network?

What is a requirement of an HA/DRS cluster?

HA and DRS will not work if two hosts in a cluster have CPUs that are from the same family but of different speeds.

Of the following options, which are requirements of an HA/DRS cluster? Pick two.

John, a VMware administrator, is experiencing strange errors with an HA/DRS cluster. Which of the following is a likely cause of HA/DRS cluster errors?

John, a VMware administrator, is trying to modify an alarm for a virtual machine, but he is unable to do so. Which of the following options is a possible reason for this failure?

Which of the following are options for a triggered alarm? Select two.

Of the following options, which can be monitored by vCenter? Select three.

Of the following two choices, which is considered worse?