CPA Software Development & Design Principles 2

Question 1

Which SOLID 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 and therefore only one reason to change.

Question 2

In the context of design patterns, which pattern provides a simplified interface to a complex subsystem?

Accepted Answer

Facade

Answer

The Facade pattern defines a simplified interface that makes a complex subsystem easier to use.

Question 3

What does the term 'cohesion' refer to in software design?

Accepted Answer

The degree to which elements within a module belong together

Answer

Cohesion measures how closely related and focused the responsibilities of a single module or class are.

Question 4

Which Agile ceremony is used to inspect the increment and adapt the Product Backlog?

Accepted Answer

Sprint Review

Answer

The Sprint Review is held at the end of a Sprint to inspect the increment and adapt the Product Backlog if needed.

Question 5

What is the primary purpose of refactoring code?

Accepted Answer

Improving code structure without changing external behavior

Answer

Refactoring improves the internal structure of code while preserving its observable behavior.

(CPA) Certified Associate Programmer Practice Test