CPA System Architecture & Design 2

Question 1

Which architectural pattern separates an application into three interconnected components: model, view, and controller?

Accepted Answer

MVC

Answer

MVC (Model-View-Controller) divides an application into three components to separate concerns: the model handles data, the view handles display, and the controller handles input.

Question 2

In a microservices architecture, how do individual services typically communicate with each other?

Accepted Answer

APIs over a network (REST or messaging)

Answer

Microservices communicate via well-defined APIs over a network, commonly using REST, gRPC, or asynchronous message queues, keeping services decoupled.

Question 3

What is the primary benefit of using a layered (n-tier) architecture?

Accepted Answer

Separates concerns so each layer has a distinct responsibility

Answer

Layered architecture organizes code into distinct tiers (e.g., presentation, business logic, data), making the system easier to maintain and modify independently.

Question 4

Which design principle states that a class should have only one reason to change?

Accepted Answer

Single Responsibility Principle

Answer

The Single Responsibility Principle (SRP) states that a class should have only one responsibility, meaning only one reason to change.

Question 5

What does 'high cohesion' mean in the context of software module design?

Accepted Answer

Elements within a module are closely related and focused on a single task

Answer

High cohesion means the responsibilities of a module are strongly related and focused, making the module easier to understand and maintain.

(CPA) Certified Associate Programmer Practice Test

(CPA) Certified Associate Programmer Practice Test

CPA System Architecture & Design 2