There are two basic types of service-oriented solution logic: __________ and __________.

Question

Options

• Aservices, service registries
• Bservices, service compositions
• Cservice candidates, service registries
• Dtop-down service models, bottom-up service models

• A
  7% (2)
• B
  89% (24)
• D
  4% (1)

Explanation

Option B is correct because in Service-Oriented Architecture (SOA), all solution logic is categorized into two fundamental building blocks: services (individual, reusable units of logic that perform specific functions) and service compositions (orchestrated combinations of multiple services working together to fulfill more complex processes).

Why the distractors are wrong:

• A - Service registries are a discovery mechanism (like a directory), not a type of solution logic itself.
• C - Service candidates are a design artifact used during analysis to identify potential services; they're not deployed solution logic.
• D - Top-down/bottom-up describe design approaches or methodologies, not types of solution logic.

Memory tip: Think of it as "atoms and molecules" - a service is the atomic unit of logic, and a service composition is how those atoms bond together into something more complex. The pair that maps to what you build and deploy is always services + compositions.

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