最新なSOA C90.03問題集（21題）、真実試験の問題を全部にカバー！

質問 1：
Cloud Provider Y owns Cloud Y, which provides a set of cloud services, virtual servers, and
one physical server. Cloud Services A and B are hosted on Virtual Server A, which is
hosted by Physical Server A.
Physical Server A also hosts Virtual Server B, which hosts redundant implementations of Cloud Services A and B for load balancing purposes. Cloud
Service Consumer A is accessing Cloud Service A located on Virtual Server A.
Cloud Service Consumer B is accessing Cloud Service B located on Virtual Server B.
Cloud Service Consumers A and B are both owned by Cloud Consumer X.
Cloud Consumer X has recently complained that Cloud Service A is becoming increasingly
unreliable. Cloud Provider Y launches an investigation that reveals that Virtual Server A
has been crashing sporadically due to successful malicious intermediary attacks where
malicious service agents have been inserting harmful data into messages sent by Cloud
Service Consumer A to Cloud Service A.

Which of the following statements describes a solution that can mitigate the malicious
intermediary attacks that have been occurring on Virtual Server A - and - can further help
prevent the same types of attacks from occurring on Virtual Server B?
A. Cloud Provider Y can implement the identity and access management mechanism for
Virtual Servers A and B by physically deploying this mechanism on Physical Server A and
then further implementing the resource replication mechanism to propagate the identity and
access management system across Virtual Servers A and B.
B. Cloud Provider Y can implement the encryption and digital signatures mechanisms to
protect the contents of messages from being augmented by malicious service agents.
C. Cloud Provider Y can implement the failover system mechanism by requiring that
redundant copies of all service agents be deployed. This will reduce the chances of any
one service agent performing malicious actions at runtime.
D. Cloud Provider Y can implement the cloud-based security group mechanism that
establishes a logical trust boundary that encompasses Virtual Servers A and B.
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 describes a solution that can be used to fulfill
the resiliency requirements of Cloud Service A?
A. A cloud balancing solution is established, whereby a resource replication mechanism is
implemented on each cloud. This allows Cloud Service A to be automatically replicated
across cloud environments, thereby enabling each implementation of Cloud Service A to
take the place of another, whenever failure conditions occur.
B. A cloud balancing solution is established, whereby an automated scaling listener
mechanism is implemented on each cloud in such a way that every cloud can automatically
scale out to another cloud. As a result, if reliability problems occur on any one cloud, the
subsequent requests will be scaled out to another cloud in a manner that is transparent to
cloud service consumers.
C. A failover system mechanism is implemented on Cloud X, which acts as the primary
point of contact for cloud service consumers. Upon failure conditions occurring, the Cloud
Service A implementation on Cloud X automatically hands over control of current and
future message requests from cloud service consumers to Cloud Y.
Cloud Y retains control of cloud service consumer communication until the next failure condition occurs, at which
point it hands over control to Cloud Z.
Finally, if a failure condition occurs in Cloud Z.control is handed back to Cloud X.
D. Redundant implementations of Cloud Service A are deployed in all three clouds. The
failover system mechanism and a special type of automated scaling listener mechanism
are implemented to establish a system whereby one redundant Cloud Service A
implementation will automatically take over from another.
正解：D