SOA S90.03 Exam Questions & Answers

Which of the following statements is true? Select the correct answer.

A. The controller service in a service composition automatically loses autonomy because it is required to compose other services that lie outside of its controlled boundary.

B. The controller service in a service composition automatically loses autonomy because it is designed as a task service to which service-orientation design principles are not applied.

C. The controller service in a service composition loses autonomy only when state deferral logic is not built into the service composition design.

D. None of these statements are true.

I have a service composition with three services. Service A retrieves a list of country codes from a database and keeps this data in memory while interacting with Service B and Service C. However, because Service A is concurrently invoked many times, and because each instance of Service A loads its own copy of the country code data into memory, the demands on the overall infrastructure become too high and performance and reliability are negatively affected. Which service-orientation principle can be applied to help solve this problem? Select the correct answer.

A. Service Reusability

B. Service Autonomy

C. Service Abstraction

D. Service Statelessness

The definition of the Service Composability design principle is as follows: "Services are effective composition participants, regardless of the size and complexity of the composition." What is meant by "regardless of the size and complexity of the composition"? Select the correct answer.

A. It means that services need to be designed so that they can participate in different types of compositions, regardless of what type of composition they are initially delivered for.

B. It means that services need to be designed for a specific composition with a specific size and level of complexity, regardless of what other compositions may need to use the service for in the future.

C. It means that the composition must be large and complex, regardless of the size and complexity of the service itself. These two design aspects need to be kept separate so that service and composition can evolve independently.

D. The definition for the Service Composability principle does not include the statement "regardless of the size and complexity of the composition".