Pattern Design Architectural and Enterprise Patterns 2

Question 1

Dependency Injection (DI) is an implementation of which design principle?

Accepted Answer

Dependency Inversion Principle

Answer

DI implements the Dependency Inversion Principle by making high-level modules depend on abstractions, with concrete dependencies provided externally.

Question 2

The Unit of Work pattern tracks:

Accepted Answer

All changes to objects during a business transaction and writes them in one batch

Answer

Unit of Work maintains a list of objects affected by a business transaction and coordinates writing out all changes in a single batch.

Question 3

The Strangler Fig pattern is used in software architecture to:

Accepted Answer

Incrementally replace a legacy system by routing traffic to new code

Answer

The Strangler Fig pattern gradually replaces a legacy system by building new functionality alongside it and routing requests to new code piece by piece.

Question 4

In the Hexagonal (Ports and Adapters) architecture, 'ports' are:

Accepted Answer

Interfaces that define how the application communicates with the outside world

Answer

Ports are technology-neutral interfaces that define the application's boundary, while Adapters implement those interfaces for specific technologies.

Question 5

Which pattern ensures that different bounded contexts in a microservice system can communicate without direct coupling?

Accepted Answer

Anti-Corruption Layer

Answer

An Anti-Corruption Layer translates between the models of two bounded contexts, preventing one context's model from polluting another.

Pattern Design Practice Test

Pattern Design Practice Test

Pattern Design Architectural and Enterprise Patterns 2