QUESTION 71
An administrator is updating a program running on a virtual machine. The update file has been downloaded as an .iso file and placed on a shared NFS datastore. An attempt to mount the .iso file to the virtual machine fails, but subsequent testing shows that the .iso file can be mounted to a virtual machine running on another ESXi 5.x host.
Which step can be taken to enable access to the .iso file for the affected virtual machine?

A.    Reboot all ESXi hosts in the cluster where the affected virtual machine is running.
B.    Refresh all datastores on the ESXi host running the affected VM.
C.    Rescan all datastores on the ESXi host running the affected VM.
D.    Unmount the volume from the ESXi host running the affected VM, and then add as a new datastore.

Answer: B
Explanation:
The first step is to refresh all datastores on the ESXi host running the affected Virtual Machine. This way, the .iso file can be get access from the affected VM. Refreshing datastores, reinitiate the connections and make sure they are working fine.

QUESTION 72
Which two conditions could prevent HA from powering on a virtual machine? (Choose two.)

A.    There is not enough free memory to meet the guests memory reservation.
B.    The virtual machine has been assigned a required affinity rule.
C.    Strict admission control is disabled for the HA cluster.
D.    The vCenter is hosted on the ESXi host that failed.

Answer: AB
Explanation:
http://pubs.vmware.com/vsphere-50/index.jsp?topic=%2Fcom.vmware.vsphere.troubleshooting.doc_50%2FGUID-A7C83499-FA81-4893-8376-A4B91AC81FA7.html

QUESTION 73
Which two migration techniques can be used together to move a running virtual machine to a local datastore on a different server? (Choose two.)

A.    Cold migration
B.    Storage vMotion
C.    vMotion
D.    vSphere Clone

Answer: BC
Explanation:
http://www.datadisk.co.uk/html_docs/vmware/vmotion.htm

QUESTION 74
Click the Exhibit button. What does the graph in the exhibit indicate?

A.    The average amount of read and write latency from the ESXi host to the SAN.
B.    The average amount of read and write latency from the guest operating system to the virtual machine
virtual disk file.
C.    The average amount of read and write latency from the ESXi host to the datastore.
D.    The average amount of read and write latency from the cluster to the datastore.

Answer: C
Explanation:
http://vmdamentals.com/?p=2603

QUESTION 75
In vSphere, a bound physical NIC can be configured to transmit and receive jumbo frames.
What is the default maximum transmission unit (MTU) in vSphere?

A.    1500
B.    5500
C.    9000
D.    9500

Answer: A
Explanation:
http://www.experts-exchange.com/Software/VMWare/A_9132-HOW-TO-Enable-Jumbo-Frames-on-a-VMware-vSphere-Hypervisor-ESXi-5-0-host-server-using-the-VMware-vSphere-Client.html (search for default MTU (Frame) size)

QUESTION 76
On which two vSphere elements can traffic shaping be configured? (Choose two.)

A.    On a vSphere Distributed Switch dvPort for inbound and/or outbound traffic
B.    On a vSphere Distributed Switch for inbound and/or outbound traffic
C.    On a vSphere Standard Switch port group or the entire vSwitch for inbound traffic
D.    On a vSphere Standard Switch port group or the entire vSwitch for inbound and outbound traffic

Answer: AB
Explanation:
http://pubs.vmware.com/vsphere-4-esxi-installable-vcenter/topic/com.vmware.vsphere.esxi_server_config.doc_41/esx_server_config/advanced_networking/t_edit_dvport_policy_traffic_shaping.html

QUESTION 77
In a vSphere HA cluster, what is the maximum number of point-to-point communication links to the slaves does each master maintain?

A.    32
B.    64
C.    512
D.    1024

Answer: A
Explanation:
Maximum point-to-point communication links to the slaves are 32. A master can communicate with 32 slaves at a time.

QUESTION 78
During peak operating hours, an administrator finds that a business-critical application running in a virtual machine is not performing as well as during normal hours.
Which memory management method can be used to guarantee that the application performs well at all times?

A.    Set a reservation equal to the average memory utilization of the virtual machine running the application.
B.    Set the share level to high for the virtual machine running the application and set the share level for all
other virtual machines to low.
C.    Check the Reserve all guest memory checkbox.
D.    Set a reservation equal to the installed memory of the ESXi host running the application.

Answer: C
Explanation:
http://thefoglite.com/2012/08/06/tune-esxi-host-memory-configuration/ (See Reservations)

QUESTION 79
A vSphere environment is created with two virtual machines, VM23 and VM43. Each virtual machine has an instance of the front-end web application for the company’s manufacturing management database. A physical load-balancer is configured for the application.
Which type of DRS rule should be implemented for VM23 and VM43?

A.    Separate Virtual Machines
B.    Virtual Machines to Hosts
C.    Host DRS Groups
D.    Keep Virtual Machines Together

Answer: A
Explanation:
Separate virtual machines can be implemented for VM 23 and VM43.

QUESTION 80
Which three services will continue to function when vCenter Server is unavailable? (Choose three.)

A.    Storage DRS
B.    Fault Tolerance (FT)
C.    vMotion
D.    Thin Provisioning
E.    High Availability

Answer: BDE
Explanation:
Fault Tolerance, vMotion and High availability will be functioning even if vCenter server is unavailable.
http://searchitchannel.techtarget.com/feature/Enabling-VMware-HA-DRS-Advanced-vSphere-features (see How HA works?)

If you want to pass the VMware VCP510 exam sucessfully, recommend to read latest VMware VCP510 Exam Question full version.