| Question.46 You have an on-premises network that contains several servers. You plan to migrate all the servers to Azure. You need to recommend a solution to ensure that some of the servers are available if a single Azure data center goes offline for an extended period. What should you include in the recommendation? (A) fault tolerance (B) elasticity (C) scalability (D) low latency |
46. Click here to View Answer
Answer is (A) fault tolerance
Fault tolerance is the ability of a system to continue to function in the event of a failure of some of its components.
In this question, you could have servers that are replicated across datacenters.
Availability zones expand the level of control you have to maintain the availability of the applications and data on your VMs. Availability Zones are unique physical locations within an Azure region. Each zone is made up of one or more datacenters equipped with independent power, cooling, and networking. To ensure resiliency, there are a minimum of three separate zones in all enabled regions. The physical separation of Availability Zones within a region protects applications and data from datacenter failures.
With Availability Zones, Azure offers industry best 99.99% VM uptime SLA. By architecting your solutions to use replicated VMs in zones, you can protect your applications and data from the loss of a datacenter. If one zone is compromised, then replicated apps and data are instantly available in another zone.
References:
https://docs.microsoft.com/en-us/azure/virtual-machines/windows/manage-availability
| Question.47 To complete the sentence, select the appropriate option in the answer area.  |
47. Click here to View Answer
Answer is in the public cloud
A private cloud is hosted in your datacenter. Therefore, you cannot close your datacenter if you are using a private cloud.
A public cloud is hosted externally, for example, in Microsoft Azure. An organization that hosts its infrastructure in a public cloud can close its data center.
Public cloud is the most common deployment model. In this case, you have no local hardware to manage or keep up-to-date” everything runs on your cloud provider’s hardware.
Microsoft Azure is an example of a public cloud provider.
In a private cloud, you create a cloud environment in your own datacenter and provide self-service access to compute resources to users in your organization.
This offers a simulation of a public cloud to your users, but you remain completely responsible for the purchase and maintenance of the hardware and software services you provide.
Reference:
https://docs.microsoft.com/en-gb/learn/modules/principles-cloud-computing/4-cloud-deployment-models
| Question.48 Your company hosts an accounting application named App1 that is used by all the customers of the company. App1 has low usage during the first three weeks of each month and very high usage during the last week of each month. Which benefit of Azure Cloud Services supports cost management for this type of usage pattern? (A) high availability (B) high latency (C) elasticity (D) load balancing |
48. Click here to View Answer
Answer is (C) elasticity
Elasticity in this case is the ability to provide additional compute resource when needed and reduce the compute resource when not needed to reduce costs. Autoscaling is an example of elasticity. Elastic computing is the ability to quickly expand or decrease computer processing, memory and storage resources to meet changing demands without worrying about capacity planning and engineering for peak usage. Typically controlled by system monitoring tools, elastic computing matches the amount of resources allocated to the amount of resources actually needed without disrupting operations. With cloud elasticity, a company avoids paying for unused capacity or idle resources and doesnג€™t have to worry about investing in the purchase or maintenance of additional resources and equipment. References: https://azure.microsoft.com/en-gb/overview/what-is-elastic-computing/
| Question.49 To complete the sentence, select the appropriate option in the answer area.  (A) fault tolerance (B) disaster recovery (C) elasticity (D) high availability |
49. Click here to View Answer
Answer is (B) disaster recovery
Reference:
https://docs.microsoft.com/en-us/azure/site-recovery/site-recovery-overview
| Question.50 For each of the following statements, select Yes if the statement is true. Otherwise, select No.  |
50. Click here to View Answer
Box 1: No
It is not true that a company must always migrate from an internal network to implement a hybrid cloud. You could start with a public cloud and then combine that with an on-premise infrastructure to implement a hybrid cloud.
Box 2: Yes
A company can extend the computing resources of its internal network by using the public cloud. This is very common. When you need more resources, rather than pay out for new on-premises infrastructure, you can configure a cloud environment and connect your on-premises network to the cloud environment by using a VPN.
Box 3: No
It is not true that only guest users can access cloud resources. You can give anyone with an account in Azure Active Directory access to the cloud resources.
There are many authentication scenarios but a common one is to replicate your on-premises Active Directory accounts to Azure Active Directory and provide access to the Azure Active Directory accounts. Another commonly used authentication method is Federation where authentication for access to cloud resources is passed to another authentication provider such as an on-premises Active Directory.
Reference:
https://azure.microsoft.com/en-gb/overview/what-is-hybrid-cloud-computing/