Service intermediaries can be further classified as __________________ or __________________ depending on whether they modify message content. Select the correct answer.

Question

Options

• Aevent-driven, dynamic
• Bactive, passive
• Ccomposed or decomposed
• Dread-oriented, write-oriented

• A
  4% (1)
• B
  92% (23)
• D
  4% (1)

Explanation

Option B is correct because service intermediaries in service-oriented architecture are classified as active (they intercept and modify message content - transforming, enriching, or filtering data) or passive (they observe and forward messages without altering content - used for logging, monitoring, or routing).

Why the distractors are wrong:

• A (event-driven, dynamic) describes architectural styles or runtime behaviors, not a classification based on content modification.
• C (composed, decomposed) refers to how services are structured or broken apart, not how intermediaries handle message content.
• D (read-oriented, write-oriented) is a data access pattern distinction (e.g., databases), unrelated to intermediary classification.

Memory tip: Link the words to their actions - an active intermediary acts on the message (changes it), while a passive intermediary just passes it through untouched.

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