Free S90.08 – Advanced SOA Design & Architecture (S90-08A) Practice Test Question

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  a service, acting as a publisher, issues event notification messages to an event management program that is responsible for broadcasting the messages

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  a service consumer, acting as a subscriber, can selectively subscribe to specific events

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  an intermediate event management program enters the role of subscriber when accepting event subscriptions

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  upon receiving a message associated with an event that a service consumer subscribed to, the service consumer enters the publisher role
  

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  Schema Centralization, XML schemas

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  Message Metadata, SOAP message headers

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  Decoupled Contract, WSDL definitions

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  Policy Centralization, WS-Policy definitions
  

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  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.

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

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

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