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EMC E20-920 問題練習

Cloud Services Expert Exam for Cloud Architects 試験

最新更新時間: 2024/03/18,合計159問。

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Question No : 1
A European company has been providing web services within their private cloud. They now wish to make these web services available globally by using a public cloud provider. You are hired as a cloud architect to help them with this transition. In your analysis, you find that a different hypervisor is being used by the public cloud provider.
As the enterprise elastically provisions resources, what is a possible solution if the hypervisors are different?

正解:
Explanation:
Since the orchestration engine is really multiple layers of software working together to create a service, it is critical that all of the layers can talk to each other. Hypervisor integration is critical, but one should also consider that hypervisors may be different between the internal and public clouds. The service catalog orchestration component needs the ability to talk to different hypervisors. Otherwise, an intermediate step will need to be developed for translation or conversion with the other hypervisor. Automation of this intermediate step may require extra development. Similar situations may occur with integration with physical resources or other management processes like metering and chargeback.

Question No : 2
What is characteristic of the IT-as-a-Service phase of IT transformation?

正解:
Explanation:
https://www.emc.com/collateral/software/white-papers/h10801-stepstoitaas-wp.pdf

Question No : 3
An organization will be deploying services in a new private cloud infrastructure. The organization has a strong enterprise and IT governance framework in place.
How will this framework likely be enhanced in the new cloud environment?

正解:

Question No : 4
A company is assessing the cloud maturity of their existing capabilities.
Which components should be analyzed to establish the baseline maturity?

正解:

Question No : 5
An IT organization in a technology company is in the process of adopting cloud services in an ITaaS model. They are seeking to reduce their operating costs while delivering business aligned services.
What is the most effective way to do so?

正解:

Question No : 6
An organization is categorizing their existing services against service characteristics to determine how ready each one might be for the catalog. Part of this effort involves looking at the following three attributes for each service characteristic: considerations, benefits, and tradeoffs.
What attributes correspond to the following characteristics: Loosely Coupled, Idempotent, and Service Contract?

正解:
Explanation:
Idempotent improves reliability and scale
Loosely coupled Late or dynamic binding of services
Service Contract Higj degree of cooperation and agreement of desging

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Question No : 7
What is an example of an overall governance principle for deploying cloud services?

正解:

Question No : 8
What key features do Web Scale infrastructure and applications share that contribute to their success?

正解:
Explanation:

2

Question No : 9
An organization is using a hybrid cloud for services. Services are designed to use Load Balancers.
Orchestration workflows are designed so that services instances are placed in multiple fault domains.
Why are services designed in such a manner?

正解:

Question No : 10
An organization has been providing web services within their private cloud. The web services, deployed through a service catalog, depend on a database resource in the private cloud.
The organization decided to make these web services availability globally by using a public cloud provider.
However, once of the web services were deployed into the public cloud, users started complaining about poor performance.
Which solution would most likely improve performance of the web services.

正解:
Explanation:
Because things fail, it is important for cloud architects to design with the assumption that the underlying microservices infrastructure can and will fail.
However, when appropriately designed, nothing will really fail. The goal is applications that continue to function―even if the underlying physical hardware fails or is removed or replaced. One way to accomplish this goal is to avoid “single points of failure.” For example, having a distributed architecture supporting multiple instances, allows the infrastructure to reorganize service workloads as required .

Question No : 11
An IT organization is in the process of transitioning to an ITaaS model and adopting cloud services.
The Chief Information Officer (CIO) is very concerned about the cultural shift in mindset that will be required in order to achieve success.
What might this concern be?

正解:

Question No : 12
An organization wishes to more efficiently produce services by unifying processes and methods from various departments to provide more cross functional integration. To achieve these goals, all elements of the infrastructure will be software driven and manual processes will be automated as much as possible.
What practice is this organization trying to adopt?

正解:

Question No : 13
A service provider is starting a new business for providing cloud services.
However, they are concerned that their cloud infrastructure design needs to be validated by usage over time and then adjusted to handle heavy loads.
What can they do to mitigate this concern with paying customers?

正解:
Explanation:
Sin explicacion en el manual.

Question No : 14
An IT department is using a number of tools to automate the expansion and contraction of the cloud resource pools.
Which cloud feature are they implementing?

正解:
Explanation:
The orchestration engine is also the primary interface for service elasticity. If you allow consumers to provision virtual machines dynamically in order to absorb load changes, then they need to have access to the orchestration APIs to make this happen. The orchestration engine can again create and remove services as needed and trigger updates to CMDB and chargeback mechanisms.
https://docs.tibco.com/pub/silver_fabric/5.7.0/doc/html/fabric-introduction/wwhelp/wwhimpl/common/html/wwhelp.htm#context=fabric-introduction&file=fabric-overview.03.2.htm

Question No : 15
The principles of Autonomy, Abstraction, Discoverability, Composability, and Reusability are all principles of what?

正解:
Explanation:




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https://www.slideshare.net/MohamedZakarya2/soa-principles-4service-loose-coupling

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