When two compatible SOAP-based Web services need to exchange an XML document that is compliant with the XML schema shared by both services, then: Select the correct answer.

Question

Options

• AA data model transformation technology, such as XSLT, must be used to enable the data
• BA new XML schema must be created to overcome the disparity between how each service
• CA WS-Policy definition must be created to establish rules that address any differences in the XML
• DNone of the above.

• A
  5% (2)
• B
  15% (6)
• C
  7% (3)
• D
  73% (30)

Explanation

D is correct because the scenario already describes a perfectly compatible exchange: both services are SOAP-compatible, share the same XML schema, and the document in question is already compliant with that schema. No additional technology or configuration is needed - the exchange works as-is.

Why A is wrong: XSLT is a transformation tool used when data must be converted between different formats or schemas. Since both services already share the same schema, there's nothing to transform.

Why B is wrong: Creating a new XML schema would only be necessary if there were a mismatch between the services' data models. A shared, existing schema already eliminates any disparity.

Why C is wrong: WS-Policy is used to express service capabilities and constraints (e.g., security requirements, message transport rules) - it does not resolve XML schema differences. More importantly, there are no schema differences here to resolve.

Memory tip: Read the question carefully for the word compatible and shared schema - these are the exam's signal that the problem is already solved. Whenever a question gives you two systems that already agree on format and structure, suspect "none of the above" as the answer, since the distractors all address incompatibility problems that don't exist in the scenario.

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