S90.08 無料問題集「SOA Advanced SOA Design & Architecture」

（A）By applying the Messaging Metadata pattern, the service consumer can write a request
identifier in the message header. Service agents then intercept the request messages and
do not forward those that contain a previously detected identifier. This practice eliminates
the delivery of the duplicate messages to the service.

（B）The Event-Driven Messaging pattern can be applied to establish a messaging
framework in which service consumers are automatically notified of relevant runtime
service events.

（C）None of these statements describe solutions that directly solve this problem.

（D）By applying the Atomic Service Transaction pattern, a service can be designed to invoke
an alternative exception handling process when it is unavailable to receive a given
message.

（A）Messaging frameworks and technologies need to provide support for the reading and
writing of message headers or properties in order to fully support the application of the
Messaging Metadata pattern.

（B）The Messaging Metadata pattern can support the application of patterns such as
Intermediate Routing by supplementing messages with activity-specific metadata.

（C）The Messaging Metadata pattern is not applicable to situations where the message
sender and receiver need to participate in stateful or conversational message exchanges.

（D）Widespread use of the Messaging Metadata pattern can be seen in the emergence of
many WS-* extensions that define industry standard SOAP header blocks that carry
metadata.

（A）False

（B）True

（A）you need to apply the Decoupled Contract pattern in order to separate the conflicting
policy definitions

（B）None of the above.

（C）you need to apply the Intermediate Routing pattern in order to allow messages to avoid
one or the other policy

（D）you did not correctly apply the Policy Centralization pattern, because it guarantees
policy conflict resolution

（A）Service agents need to be versioned, just like services.

（B）Changes to a single service agent can impact multiple services throughout a service
inventory.

（C）All of the above.

（D）You will need to determine who will own and maintain the service agents.

（A）WS-BPEL

（B）WS-Coordination

（C）WS-Addressing

（D）WS-ReliableMessaging

（A）The Compensating Service Transaction pattern is one of the core patterns that comprise
the Enterprise Service Bus compound pattern.

（B）The Compensating Service Transaction pattern is often applied by calling one or more
"undo" operations provided as service capabilities of the services participating in a
composition.

（C）A compensating service transaction must be designed independently and without
knowledge of the technical service contracts belonging to the composition members.

（D）Compensating logic is generally expressed in its own process definition and separated
from the overall service composition logic.

（A）no coupling of the wrapper service logic to the service contract

（B）no coupling of the service consumer to the legacy system encapsulated by the wrapper
service D.
no coupling of the service logic to the service contract

（C）no coupling of the wrapper service logic to the legacy system

（A）core service logic, resource

（B）core service logic, legacy system

（C）All of the above.

（D）core service logic, database

（A）service contract

（B）None of the above.

（C）service agent

（D）service activity