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SOA Certified Professional Cloud Technology Lab 認定 C90-03A 試験問題:

1. Cloud Service A is being made available on public Cloud X by Cloud Provider X via the SaaS delivery model. Cloud Service A is hosted by Physical Server A that also hosts cloud services being used by different cloud service consumers (and owned by different cloud service owners).
Cloud Service Consumers A and B access Cloud Service A on a regular basis and Physical Server A has been able to accommodate the resulting usage load After reviewing the implementation environment for Cloud Service A. Cloud Provider X determines it needs to enhance the ubiquitous access and multi-tenancy characteristics within this part of Cloud X.

Which of the following statements accurately describes a solution that fulfills all of these requirements?

A) The multi-device broker mechanism can be implemented to address ubiquitous access requirements by broadening the range of cloud service consumers that can access Cloud Service The resilient computing mechanism can be implemented to establish the multitenancycapabilities of Cloud Service A so that it will be able to resiliency accommodate the additional cloud service consumer devices that will gain access to it.
B) The resilient computing mechanism can be implemented to address ubiquitous access requirements by making Cloud Service A available to a broader range of cloud service consumer devices, including desktops running Web browsers and various mobile devices. The resource replication mechanism can be implemented to enable multi-tenancy within the Cloud Service A implementation.
C) The multi-device broker mechanism can be implemented to address ubiquitous access requirements by broadening the range of cloud service consumers that can access Cloud Service A. The virtual server mechanism can be implemented to establish the multitenancy capabilities of Cloud Service A.
D) The resource replication mechanism can be introduced to address ubiquitous access requirements by broadening the range of cloud service consumers that can use Cloud Service A via standard service replication. The virtual server mechanism can be implemented to enable multi-tenancy via each service replication resulting from the application of the resource replication mechanism.

2. Cloud Consumer A (the organization that owns Cloud Service Consumer A) needs regular access to an external, cloud-based Weather Service that provides up-to-date weather forecast information. Cloud Providers X, Y and Z are competing public cloud providers, each offering a Weather Service with the features required by Cloud Consumer A.

Based on the provided statistics, which cloud provider can offer a Weather Service with the least amount of projected downtime?

A) Any of the three cloud providers, because their availability ratings are identical.
B) Cloud Provider Z
C) Cloud Provider X
D) Cloud Provider Y

3. Organization A has been expanding and, as a result, is outgrowing the processing capacity of its on-premise Service A implementation. It is determined that this is due to usage thresholds of Service A and complex data processing limitations in Database A. The diagram depicts Organization A's current on-premise environment, where Service Consumers A. B and C attempt to access Service A at the same time. Service Consumer A successfully accesses Service A, which then successfully retrieves the requested data (1). Service Consumer B successfully accesses Service A, but due to the complex data structure, the request for the data times out and fails (2). Finally, Service Consumer C attempts to access Service A, but is rejected because Service A is unable to accept more concurrent requests.

Organization A is required to continue using its on-premise Service A implementation, with the exception of Database A, which does not need to remain on-premise. Database A is dedicated to Service A and is comprised of relational data. Which of the following statements provides a solution that uses cloud-based IT resources to solve the performance limitations of Service A and Database A?

A) A failover system can be implemented in a hybrid architecture comprised of Organization A's existing on-premiseenvironment and a public cloud environment. The failover system would span both environments so that when Service A is unable to process request messages from Service Consumers A, B or C, the failover system can automatically route messages to a redundant implementation of Service A residing in the public cloud. Similarly, when Database Ais unable to process a data access request from Service the failover system can automatically route this request to a redundant implementation of Database A, also residing in the public cloud.
B) A cloud bursting solution can be implemented, whereby a redundant copy of Service A is implemented within a public cloud. This cloud-based, redundant implementation of Service A is referred to as Cloud Service A. A copy of Database A is also implemented within the cloud and both the on-premise and cloud-based copies of Database A are redesigned to be non-relational in order to improve data access performance. Service A continues to act as a first point of contact for Service Consumers A, B and An automated scaling listener is deployed so that when Service A's thresholds are met, requests are automatically routed to Cloud Service A.
C) The state management database and resource replication mechanisms can be implemented to establish redundantimplementations of Service A and Database A in both on-premise and cloud environments. Using resource replication, a cloud-based duplicate of Service A (Cloud Service A) will be established in a public cloud and will remain in synch with Service A via regular replication cycles. Using the resource replication mechanism together with the state management database mechanism allows for Database A to be dynamically replicated in an independent state management database that has redundant implementations in both on-premise and cloud environments. The state management database can be further optimized to support non-relational data to improve data access performance.
D) None of the above

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