ITPEC FE Morning October 2022 Question 61

Building software from components called services — SOA (Service-Oriented Architecture) makes a system easier to change when the business changes.

In SOA each business function, such as order entry or a credit check, is implemented as a service with a standard interface. A system is assembled by combining services, and each service can be reused or replaced on its own. When a business process changes, the system follows by recombining or swapping services instead of being rebuilt.

Answer (b)

Why not others:

• •(a) — business, data, application and technology views, optimized together for the business and the system, describe EA (Enterprise Architecture)
• •(c) — designing with only the three structures sequence, selection and iteration is structured programming
• •(d) — building an information model and a function model together from data flow diagrams is a structured analysis method, not an architecture made of services

Key rule: SOA is about the unit of construction, reusable and loosely coupled services with standard interfaces; EA is about describing the whole organization in four architecture views.

System Strategy · AI-written, may contain errors