SOA C90.03 問題集

質問 1：
A company is planning to build and launch a new SaaS product that will be available for
use by the general public. It intends to build the service on-premise and then deploy it in a
public cloud. The company has the following set of four requirements for the
implementation of the new service:
1. The cloud service needs to exchange messages primarily by using HTTP methods and
other features provided by HTTP.
2. The cloud service needs to store highly structured data with potentially complex
relationships.
3. The cloud service needs to be deployed on a dedicated virtual server that can be
administered with a high level of control by the cloud consumer's own cloud resource
administrator.
4. The cloud service needs to be deployed with a minimal amount of integration testing.
For this project, the company has a very limited budget. The company is assessing the IT
resources that are offered by Clouds X and Y within the constraints of its limited budget.
Cloud X can offer an IaaS environment with very few proprietary characteristics that
includes a database that supports only no relational storage, as well as support for the
deployment and usage of REST services.

Cloud Y can offer a PaaS environment with a pre-configured virtual server that includes
native support for WSDL and SOAP, as well as a database that supports only relational
storage. The implementation of a new service within Cloud Y will require compliance to a
high level of proprietary characteristics.
As previously listed, the company has identified four specific implementation requirements
for its new cloud service. Which of the following statements correctly identifies how many of
the four requirements Clouds X and Y can directly fulfill?
A. Cloud X fulfills 1 out of 4 requirements. Cloud Y fulfills 3 out of 4 requirements.
B. Cloud X fulfills 3 out of 4 requirements. Cloud Y fulfills 1 out of 4 requirements.
C. Cloud X fulfills 2 out of 4 requirements. Cloud Y fulfills 2 out of 4 requirements.
D. Cloud X fulfills 0 out of 4 requirements. Cloud Y fulfills 4 out of 4 requirements.
正解：B

質問 2：
The cloud service owner of Cloud Service A is evaluating Clouds X, Y and Z to determine
which cloud environment can offer the greatest level of reliability. All three clouds are
geographically dispersed across three separate time zones. As a result, each cloud
experiences usage peaks at different times. Based on the metrics provided, the greater the
usage of a cloud, the lower its reliability. When the cloud service owner complains to Cloud
Provider A (the owner of all three clouds) that none of the clouds provide an adequate level
of reliability, Cloud Provider A suggests a solution that increases resiliency.

Which of the following statements accurately describe how a cloud balancing solution can
be implemented to fulfill the resiliency requirements of Cloud Service A?
A. Clouds X, Y and Z are equipped with failover system mechanisms and specialized types
of automated scaling listener mechanisms in order to establish cross-cloud resiliency.
Cloud Service A is configured so that Clouds X, Y and Z can dynamically generate
redundant instances on-demand.
B. Using a PaaS environment, the cloud service owner can configure a primary Cloud
Service A implementation on Cloud X so that when failure conditions occur, message
requests from cloud service consumers are automatically routed to a redundant on-premise
implementation of Cloud Service A.
This requires the implementation of the failover system and resource replication mechanisms.
C. A type of automated scaling listener that can also be considered a cloud monitor is
implemented in Clouds X, Y and Z to establish a system whereby each cloud can assume
control of cloud service consumer message exchanges. This results in resilient cloud
balancing, as opposed to on-demand cloud balancing.
D. Cloud Service A is redundantly deployed in advance within Clouds X.
Y and Z and is further supplemented with failover system mechanisms and specialized types of automated
scaling listener mechanisms.
正解：A,D