1Z0-574 Exam Dumps | Service-Oriented Integration is based on creating a catalogue of SOA Services that expose existing capabilities

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Question 116/176

Service-Oriented Integration is based on creating a catalogue of SOA Services that expose existing capabilities from back-end systems. Which statement best describes how an SOA Service relates to the existing back-end systems?

A. Each SOA Service exposes the functionality from only a single back-end system to ensure the decoupling of SOA Services.

B. An SOA Service should expose the low-level interface of the back-end system to ensure that all back- end system capabilities are fully exposed.

C. An SOA Service should expose higher-level business capabilities by encapsulating the lower level Interfaces of the back-end systems.

D. Each SOA Service should expose only one isolated capability of the back-end systems to ensure isolation between SOA Service calls in composite applications.

E. All access to a back end system should be through a single SOA Service to ensure the back-end system will net become overloaded by service requests.

F. An SOA Service should connect to at least two back-end systems; otherwise the SOA Service is just duplicating the existing interface to the back-end system.

Correct Answer: C

Explanation/Reference:
The primary purpose of the Business layer in the architecture is to define and automate the business processes external to, and independent of, the specific backend systems used in the organization. This isolates the business process from backend system changes, and conversely, isolates the backend systems from business process changes.
De-coupling the business processes from the backend systems simplifies changes and maintenance for business processes and backend systems.
The Business layer generally provides the greatest and most measurable business value.
Reference: Oracle Reference Architecture, Service-Oriented Integration, Release 3.0

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