VMware VMware Certifications 2V0-620 Questions & Answers

• Question 91:

  An administrator needs to verify that vMotion operations can be performed in a vSphere data center.

  What round trip time (RTT) latency is the maximum value that will allow vMotion operations to succeed?

  A. 50ms RTT

  B. 100ms RTT

  C. 150ms RTT

  D. 200ms RTT

  Correct Answer: C

• Question 92:

  Which three are requirements when using vMotion to move a virtual machine across vCenter Server systems? (Choose three.)

  A. Both vCenter Servers must be using Enhanced Linked Mode.

  B. Both vCenter Servers must be in the same Single Sign-On Domain.

  C. Time must be synchronized.

  D. Duplicate VM MAC addresses must be configured.

  E. Both vCenter Servers must have High Availability enabled on source and destination clusters.

  Correct Answer: ABC

  Both of the vcenter servers must be using enhanced linked mode along with the same single sign-on

  domain. And the time must be synchronized.

  Reference: https://kb.vmware.com/selfservice/microsites/search.do?

  language=en_USandcmd=displayKCandexternalId=2106952

• Question 93:

  Which three operations occur during a cold migration of a virtual machine? (Choose three.)

  A. The virtual machine disks are moved if the datastore is being changed.

  B. The virtual machine is registered with the destination server.

  C. The source virtual machine is removed from the old hosts.

  D. The virtual machine hardware is upgraded.

  E. The virtual machine files are quiesced prior to the migration.

  Correct Answer: ABC

  First, the virtual machine disks are moved if the datastore is being changed, the virtual machine is registered with the destination server and the source virtual machine is removed from the old host/s. Reference: https://kb.vmware.com/selfservice/microsites/search.do? language=en_USandcmd=displayKCandexternalId=1010045

• Question 94:

  vMotion can be performed between which three physical boundaries? (Choose three.)

  A. Between two vCenter Server Systems

  B. Between two vSphere Distributed Virtual Switches

  C. Between two vCenter Server Datacenter objects

  D. Between two VMware NSX Layer 4 segments

  E. Between two NFS datastores

  Correct Answer: ABC

  vMotion can be performed between two vCenter servers, two vsphere distributed virtual swiches and between two vcenter server datacenter objects.

  Reference: https://www.vmware.com/products/vsphere/features/vmotion

• Question 95:

  Which two actions are required when enabling vFlash Read Cache for a virtual machine's virtual disk? (Choose two.)

  A. A value in the Virtual Flash Read Cache text box must be entered.

  B. A Flash Resource Pool for Cache size reservation must be entered.

  C. The Device backing and the block size must be configured.

  D. The Enable virtual flash host swap cache check box must be selected.

  Correct Answer: AD

  To enable vFlash Read cache for VM virtual disk, enter a value in virtual flash read cache text box and

  enable virtual flash host swap ache check box.

  Reference: http://www.yellow-bricks.com/2013/08/26/introduction-to-vsphere-flash-read-cache-aka-vflash/

• Question 96:

  An administrator is tasked with performing a vMotion migration of a virtual machine. The virtual machine is configured as follows: vSphere Flash Read Cache (vFRC) enabled Is part of a Distributed Resource Cluster (DRS) Cluster

  Which two statements are true? (Choose two.)

  A. Each ESXi host in the cluster supports multiple virtual flash resources.

  B. Each ESXi host in the cluster supports one virtual flash resource.

  C. DRS treats powered-on virtual machines with Flash Read Cache as having a preferred affinity to their current host and moves them only for mandatory reasons.

  D. DRS treats powered-on virtual machines with Flash Read Cache as having a required affinity to their current host and does not move them.

  Correct Answer: BC

  Each ESXi host in the culster supports one virtual flash resource. Secondly, DRS treats powered-on virtual

  machines with Flash Read Cache as having a preferred affinity to the current host.

  Reference: http://www.yellow-bricks.com/2013/09/11/frequently-asked-questions-vsphere-flash-readcache/

• Question 97:

  Which two statements are true regarding VMware vSphere Flash Read Cache (vFRC)? (Choose two.)

  A. Cache fills and cache evictions happen in the granularity of a cache block size.

  B. vFRC caches data from both read and write I/Os, but write I/Os are always serviced by the underlying storage.

  C. vFRC caches data from both read and write I/Os, but write I/Os are always serviced by the underlying cache data.

  D. Cache fills and cache evictions happen in the granularity of the disk block size.

  Correct Answer: AB

  Cache fills and cache evictions happen in the granularity of a cache block size. This value ranges from 4KB to 1MB to enable you to best configure your cache block size based on the I/O size of workloads. Even though cache fills and cache evictions happen in the granularity of a cache block size, actual read I/O serviced by the cache can be smaller than the cache block size. For example, if the cache block size is 64KB, and a 4KB read I/O request is issued by the guest virtual machine, and if the data is not available in the cache, a 4KB read is issued to the VMDK. When populating the cache, the vFRC algorithm looks for a 64KB region to place the new 4KB data. If no free space is available, a 64KB region is evicted and the space is used to hold the new 4KB data. The remaining 60KB region in the 64KB cache block is marked as invalid. The cache block size parameter therefore has profound effects on performance

  Reference: https://www.vmware.com/files/pdf/techpaper/vfrc-perf-vsphere55.pdf

• Question 98:

  Refer to the Exhibit.

  

  An administrator has created the resource pool configuration shown in the Exhibit. Based on the exhibit, which virtual machine(s) can be successfully powered on?

  A. VM-M1 only

  B. VM-K1 only

  C. VM-K1 and VM-K2 only

  D. VM-K1, VM-K2, and VM-M1

  Correct Answer: D

• Question 99:

  An administrator is moving a virtual machine into a resource pool. The VM and resource pool are configured as shown:

  VM configuration: 2GHz CPU reservation 1GB Memory limit

  Resource Pool configuration: 6GHz CPU reservation 1GB Memory reservation No limit to memory

  What happens to the virtual machine's resource settings when it is moved into the pool?

  A. The VM inherits the resource settings of the resource pool if expandable reservations is enabled.

  B. The VM's reservations and limits are ignored and removed.

  C. The VM keeps the 2GHz CPU reservation but receives the 1GB memory reservation.

  D. The VM keeps the 2GHz CPU reservation and the 1GB Memory limit.

  Correct Answer: D

  When the VM is moved into the pool, it keeps the 2 GHz CPU reservation and 1 GB memory limit. Reference: https://pubs.vmware.com/vsphere-60/topic/com.vmware.ICbase/PDF/vsphere-esxi-vcenterserver-60-resource-management-guide.pdf

• Question 100:

  What is true about resource pools created on a Distributed Resource Scheduler (DRS) cluster?

  A. A root resource pool is created with the specified values.

  B. A root resource pool is automatically created using the aggregate total of the ESXi host resources in the cluster.

  C. A root resource pool is automatically created using the aggregate total of all resources in the datacenter.

  D. A root resource pool is not needed when creating resource pools on a DRS cluster.

  Correct Answer: B

  A root resource pool is automatically created using the aggregate total of the ESXi host resources in the cluster. Reference: https://www.vmware.com/pdf/vmware_drs_wp.pdf