DVA-C02 Question 12
Single answerYou are designing an order processing system for an e-commerce platform. The system must handle high volumes of incoming orders, process each order independently, and integrate with multiple downstream services like payment processing, inventory management, and shipping. The architecture should allow for scalability, fault tolerance, and loose coupling between components. Which architectural pattern is the most suitable for this use case?
- A
Monolithic architecture
- B
Microservices with orchestration
- C
Event-driven architecture with a fanout pattern
- D
A tightly coupled service-to-service communication model
Show answer and explanation
Correct answer: C
Explanation
Event-driven architecture with a fanout pattern is the best choice for this use case because it enables loose coupling, independent processing, and scalability. The fanout pattern ensures that a single event (e.g., an order placed) can trigger multiple downstream processes (e.g., payment, inventory, and shipping) without the services being tightly integrated. This design aligns with the principles of modern cloud-native applications.
- A. Incorrect.
Monolithic architectures are not ideal for handling high volumes of traffic or for ensuring loose coupling between components. They often face scalability and fault tolerance challenges.
- B. Incorrect.
Microservices with orchestration can provide some benefits, but they introduce a central orchestrator, which can become a single point of failure and may reduce scalability compared to event-driven architectures.
- C. Correct.
Event-driven architecture with a fanout pattern is ideal for this scenario because it decouples components, allows independent processing of orders, and can scale efficiently as traffic increases. Each downstream service can independently subscribe to the events it needs.
- D. Incorrect.
A tightly coupled service-to-service communication model is not suitable for this use case as it creates dependencies between services, reducing scalability and fault tolerance.