2014年6月26日星期四

S90-18A Test Questions, C90-05A Practice Test

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Exam Code: S90-18A
Exam Name: Fundamental SOA Security
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S90-18A Latest Dumps Total Q&A: 98 Questions and Answers
Last Update: 2014-06-25

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Exam Code: C90-05A
Exam Name: Advance Cloud Architecture - C90.05
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NO.1 Service A and Service B belong to Organization A and Service C belongs to Organization B. Service A
sends confidential messages to Service B, which forwards these messages to Service
C. The message sent to Service C is intercepted by a load balancing service agent that determines which
instance of Service C to route the message to. This entire message path needs to be encrypted in order
to ensure message confidentiality from when the message is first sent by Service A until it is received by
an instance of Service C. Organization A doesn't trust any intermediaries that may exist in between
Service B and Service C and also doesn't want to share any keys with Organization B. Furthermore, there
is a requirement to minimize any adverse effects on performance. Which of the following approaches
fulfills these requirements?
A. Use message-layer security by adding symmetric encryption between Services A, B and C. This
way,message content is not available to any intermediaries between Services B and C.
B. Because Service A and Service B exist within the same organizational boundary, use transport-layer
security to provide message confidentiality. Use message-layer security via asymmetric encryption
between Service B and Service C.
C. Use transport-layer security between Service B and Service C and use message-layer security via
asymmetric encryptionbetween Service A and Service B. This way. all the services are secured while at
the same time minimizing the performance degradation between Service B and Service C.
D. None of the above.
Answer: B

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NO.2 A task service needs to access three entity services as part of a service composition. The task service
needs to authenticate itself every time it accesses one of the three entity services. Because the task
service must authenticate itself three times to complete its task, the current service composition design is
considered inefficient. How can it be improved while continuing to fulfill the authentication requirements?
A. Increase the network bandwidth between the task service and the entity services.
B. Use a single sign-on mechanism.
C. Remove the authentication requirements within the service composition, thereby reducing the
message size and making communication faster.
D. None of the above
Answer: B

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NO.3 Which of the following is not a hashing algorithm?
A. MD5
B. X.509
C. SHA-1
D. SHA-256
Answer: B

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NO.4 The SAML and WS-Security industry standards can be applied to the same service composition
architecture.
A. True
B. False
Answer: A

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NO.5 The application of the Data Origin Authentication pattern only provides message integrity.?
A. True
B. False
Answer: B

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NO.6 The use of XML-Encryption supports the application of the Service Abstraction principle because the
actual message remains hidden from the attacker.
A. True
B. False
Answer: B

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NO.7 The application of the Brokered Authentication pattern is best suited for a scenario whereby a service
consumer does not need to re-authenticate itself with multiple services.
A. True
B. False
Answer: B

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NO.8 Service A relies on a shared identity store. Service B has its own identity store. Service C also has its
own identity store, but must also access the shared identity store used by Service A. Which service has
the least reduction in autonomy as a result of its relationship with identity store mechanism(s)?
A. Service A
B. Service B
C. Service C
D. The autonomy of all services is affected equally
Answer: B

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