SOA C90.03 : Cloud Technology Lab

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SOA C90.03 시험 개요:

SOA C90.03 시험 요강 주제:

SOA C90.03 응시 전 알아두어야 할 질문들

최신 SOA Certification C90.03 무료샘플문제

문제 #1

Cloud Service Consumer A invokes Cloud Service A from Cloud X (owned by Cloud
Provider X) (1). To fulfill the request from Cloud Service Consumer A, Cloud Service A
needs to invoke Cloud Service B that resides on Cloud Y (owned by Cloud Provider Y) (2).
After completing its processing, Cloud Service B sends a response to Cloud Service A (3).
Cloud Service A verifies the response and then finally sends its response to Cloud Service
Consumer A (4).

The guaranteed availability of the Cloud Service A implementation is 95% and the
guaranteed availability of the Cloud Service B implementation is 95%. Which of the
following statements accurately describes the actual availability that Cloud Service
Consumer A can receive based on the described scenario?

A. As a result of the dependency formed by Cloud Service Aon Cloud Service B, the
combined availability decreases significantly as follows:
(0.95 X 0.95) - 0.1 = 0.8025 or 80.25%
B. Because Cloud Service A acts as both a cloud service and cloud service consumer in
order to process Cloud Service Consumer B's request message, Cloud Service A forms a
dependency on Cloud Service B.
As a result, the combined availability decreases, as follows:
0.95 X 0.95 = 0.9025 or 90.25%
C. Because Cloud Service Consumer A's response message is processed by two separate
cloud services, the combined availability increases as follows:
1 - (1 - 0.95) X (1 - 0.95) = 0.9975 or 99.75%
D. Cloud Service Consumer A benefits from redundant cloud service implementations,
thereby increasing the guaranteed availability as follows:
1 - (1 - (0.95 - 0.1)) X (1 - (0.95 - 0.1)) = 0.9775 or 97.75%

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

문제 #3

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 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.
B. 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.
C. Cloud Provider Y can implement the encryption and digital signatures mechanisms to
protect the contents of messages from being augmented by malicious service agents.
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.

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