If a service can have one or more service capabilities, then how can a service consumer interact with a service?

Question

Options

• AIt can't. The service must only provide one service capability in order for it to be accessible by service
• BEach service capability represents a function that the service has to offer. The service consumer can
• CService capabilities are designed to be composed together, which means that in order for a service
• DServices do not have service capabilities that are explicitly invoked. Services almost always exist as

• A
  4% (1)
• B
  93% (25)
• D
  4% (1)

Explanation

Option B is correct because a service capability represents a discrete, individually invocable function exposed by a service. When a service offers multiple capabilities, the consumer simply selects and invokes whichever specific capability fulfills its need - the existence of multiple capabilities doesn't restrict access, it expands it.

Why the distractors are wrong:

• A is incorrect because a service is not limited to one capability; multiple capabilities are a feature, not a barrier. Consumers can invoke any individual capability regardless of how many exist.
• C is incorrect because service capabilities do not need to be composed together as a prerequisite for interaction. Each capability stands on its own and can be invoked independently.
• D is incorrect because service capabilities are indeed explicitly invoked - that's their entire purpose. Services don't "just exist" passively; consumers actively call specific capabilities to trigger behavior.

Memory tip: Think of a service as a TV remote and each service capability as a button. You don't need to press all the buttons to use the remote - you pick the one you need. A consumer picks the capability (button) that does what it wants.

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