B.S.W.E. Bachelor of Software Engineering Software Architecture & Design Patterns 2

Question 1

What is the main purpose of the Repository pattern?

Accepted Answer

To abstract data access logic from business logic

Answer

The Repository pattern abstracts the data layer, providing a clean API for data access to the business logic without exposing persistence details.

Question 2

Which architectural style uses stateless communication over HTTP?

Accepted Answer

REST

Answer

REST (Representational State Transfer) uses stateless HTTP communication with standard methods like GET, POST, PUT, and DELETE.

Question 3

What is 'cohesion' in software design?

Accepted Answer

How well elements within a module belong together

Answer

Cohesion measures how strongly related and focused the responsibilities of a single module are — high cohesion is preferred.

Question 4

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

Accepted Answer

Single Responsibility Principle

Answer

The Single Responsibility Principle states that a class should have only one responsibility and thus only one reason to change.

Question 5

What is the Observer pattern used for?

Accepted Answer

Notifying multiple objects about state changes

Answer

The Observer pattern defines a one-to-many dependency where multiple observers are automatically notified when the subject's state changes.

B.S.W.E. Bachelor of Software Engineering Practice Test