VDCD510 VMware Certified Advanced Professional 5 - Data Center Design (VDCD510)

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Question 1

If the design specifies an RTO of 3 hours and an RPO of 2 hours, and the system crashes
at 8:00 p.m., the application be back online _______________.

  • A. by 10:00 p.m
  • B. ASAP
  • C. by 11:00 p.m
  • D. by 9:00 p.m


Answer : C

Explanation: The RTO is the amount of time until a crashed application should be back online. The RPO is the tolerated amount of data loss.

Question 2

DRS and vMotion can help increase consolidation ratios.

  • A. True
  • B. False


Answer : A

Explanation: DRS can be configured for fully automated mode and can review performance statistics on hosts. Assuming that all workloads will not have the same peak period of time, you can load balance workloads across the hosts and reuse resources in different scenarios through the working day to increase consolidation ratios. Chapter 4, The Importance of vMotion, VMware HA, and Fault Tolerance

Question 3

A guest VM should be sized using ____________. (Choose two)

  • A. minimum applications specifications
  • B. initial workload
  • C. anticipated workloads


Answer : A,C

Explanation: Allocated resources are shown in the guest operating system and are not guaranteed. The amount depends on the unreserved resources available at the time. Assuming no functionality issues, you can configure a production application to be guaranteed its projected workload, and the system should deliver. Without a reservation, there is potential for a performance impact if there is contention. Chapter 5, Virtual MachinesFrom the Design Perspective

Question 4

A DR project requires a recovery time objective (RTO) of 4 hours and has a recovery point
objective (RPO) of 2 hours. The system fails at 8 p.m. on a Sunday evening. At what time
is the application expected to be available to the end users?

  • A. Midnight
  • B. 10 p.m.
  • C. 2 a.m.
  • D. 11 p.m.


Answer : A

Explanation: The recovery time objective (RTO)also known as the return to operationis the amount of time it takes to restore a service after a failure has taken place. The recovery point objective (RPO) is the point in time to which the system needs to be restored following a failure. Chapter 3, RTO, RPO, and All That Stuff?

Question 5

The ________ virtual machine scaling approach allows a VM to be created initially on a few
metrics or highlevel requirements and scaled through the virtual machines life cycle.

  • A. comprehensive
  • B. predictive
  • C. adaptive
  • D. literal


Answer : C

Explanation: The adaptive approach is used when a virtual machine is built with only a few requirements and then can be scaled once the application is in place and performance is measured based on the few requirements. Then the VM can be scaled according to what the performance indicates.

Question 6

Which of the following will still function if vCenter crashes?

  • A. HA
  • B. DRS
  • C. FT
  • D. Storage DRS


Answer : A

Explanation: Although all the options listed require the vCenter Server for configuration, HA will work even if the vCenter Server crashes. For this reason, VMware recommends running the vCenter Server in a virtual machine so HA can provide the vCenter Server availability.

Question 7

A best practice can change over time.

  • A. True
  • B. False


Answer : A

Explanation: A best practice is based on experience with delivering a solution. A new product will have limited best-practice information except for vendor- or vendor-partner-based recommendations. The longer a technology is used in a community, the more potential success; therefore, best practices can change over time. Chapter 6, Validation, Thoughts, and Processes

Question 8

An organization is considering buying hosts that have one three-port NIC rather than
buying hosts that have three one-port NICs. Is this a good idea? Why or why not?

  • A. This is a good idea; one three-port NIC means fewer PCI slots.
  • B. This is a good idea; one card is cheaper than three.
  • C. This is not a good idea; one card translates to a single point of failure.
  • D. This is not a good idea; three-port NICs are expensive


Answer : C

Explanation: If the one three-port NIC fails, you will usually lose all three ports on the NIC. It would be a better solution to use three one-port NICs instead. You lose one card, and you lose only one port.

Question 9

Which of the following type of discovery methods used in state-analysis techniques is more
likely to affect application or server performance.

  • A. Active
  • B. Passive
  • C. Both A and B


Answer : A

Explanation: There are two types of discovery methods: active and passive. Active discovery methods can run processes that are detrimental and can impact a system. They normally require an agent. With passive discovery methods, data is obtained in a non-impact, non-intrusive manner, with no agents. Obtaining and interpreting/presenting data such as this normally requires more experience. Chapter 2, Selecting the Best Tool for the Job

Question 10

A validation plan can be used to gather further requirements.

  • A. True
  • B. False


Answer : B

Explanation: A validation plan can range from a detailed test plan to high-level statements. It should not be subjective. The best validation is to place a platform under a typical test of what it will be faced with in the field for example, having a simulated number of users go through a workflow (perhaps a website). A lot of these tasks vary with the type of application and are primarily application functionality based. In addition, platform or infrastructure metrics are key for validation and for information to be used within the operational documentation (for example, troubleshooting guide, monitoring recommendations).

Question 11

Has the configurable option "Failure Detection Time" in VMware HA has been removed in
vSphere 5?

  • A. No. It is an advanced setting.
  • B. Yes. It is no longer needed due to additional storage checks in the VMware HA isolation response process.


Answer : B

Explanation: vSphere 5 will use datastore heartbeats in a disaster. Thus, this setting is no longer available or supported in VMware vSphere 5. Chapter 4, The Importance of vMotion, VMware HA, and Fault Tolerance

Question 12

VMware Fault Tolerance can prevent virtual machine downtime in the event of an
application failure.

  • A. True
  • B. False


Answer : B

Explanation: Fault Tolerance can only prevent virtual machine downtime in the event of an ESXi host crash.

Question 13

VMware HA may not restart all guest workloads if _______________.

  • A. admission control policy is disabled
  • B. the resources are fragmented between nodes in the cluster and DRS is not in fully automated mode
  • C. the master ESXi node has crashed


Answer : B

Explanation: An admission control policy tells VMware HA how to calculate the resources it needs to reserve for a cluster. It uses a combination of memory and CPU reservation configuration or, if no configuration exists, a default low reservation.

Question 14

In scaling an architecture, scaling out involves ___________.

  • A. selecting a smaller number of large hosts
  • B. selecting a larger number of smaller hosts
  • C. using a combination of large and small hosts to satisfy virtual machine requirements
  • D. none of the above


Answer : B

Explanation: Scaling out involves building your architecture using more hosts that have smaller amounts of CPU cores and memory than what you would use in a scaled-up architecture.

Question 15

A functional requirement in a design requires management, IP-based storage, vMotion, and
virtual machine traffic to be physically separated. Which option best fulfills the functional
requirement?

  • A. Using a single virtual switch, applying VLANS for each traffic type, and configuring the physical adapters to use different physical switches
  • B. Using distributed virtual switches
  • C. Using a different virtual switch for each type of traffic and having all network adapters use the same physical switch
  • D. Using a different virtual switch for each type of traffic and having the physical adapters use different physical switches


Answer : D

Explanation: VLANs can be used to logically separate network traffic. Separate virtual switches will physically separate the traffic on the ESXi host, but using a single physical switch introduces a single point of failure. The best answer is D: Using different physical switches will allow for redundancy.

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