CPSA Architectural Patterns and Styles 2

Question 1

In Hexagonal Architecture (Ports and Adapters), what is the primary role of a 'port'?

Accepted Answer

An interface defining how the application interacts with the outside world

Answer

A port is an interface (API or SPI) that defines how the core domain communicates with external actors, keeping the domain independent of specific technologies.

Question 2

Which architectural pattern separates the responsibility of reading data from writing data into distinct models?

Accepted Answer

CQRS (Command Query Responsibility Segregation)

Answer

CQRS splits the application into a Command side (writes/mutations) and a Query side (reads), allowing each to be optimized independently.

Question 3

Event Sourcing stores application state as a sequence of events. What is the main advantage of this approach?

Accepted Answer

A complete audit trail and the ability to reconstruct past states

Answer

Because every state change is recorded as an immutable event, you can replay the event log to reconstruct the system state at any point in time.

Question 4

In the Strangler Fig pattern, what happens to the legacy system over time?

Accepted Answer

New functionality wraps and gradually replaces the old system until the legacy is removed

Answer

Like a strangler fig vine, new services incrementally take over functionality from the legacy system until the old system can be decommissioned.

Question 5

Which of the following best describes the Pipe-and-Filter architectural style?

Accepted Answer

Processing steps (filters) are connected by data channels (pipes) enabling sequential transformation

Answer

In Pipe-and-Filter, independent filter components process data and pass results through pipes, enabling composable, reusable processing chains.

CPSA Exam Practice Test

CPSA Exam Practice Test

CPSA Architectural Patterns and Styles 2