SAP-C02 Design for New Solutions Practice Question
A company is designing a new microservices architecture using Amazon ECS with Fargate. The services need to communicate with each other. Which THREE mechanisms can be used for service-to-service communication? (Choose THREE.)
⚠ Common exam trap
A common mix-up: candidates confuse asynchronous messaging (SQS) or data stores (DynamoDB) with direct service-to-service communication, overlooking that microservices typically require synchronous HTTP/gRPC calls or service mesh patterns for real-time interactions.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Amazon API Gateway as a front end
Amazon API Gateway acts as a front-end proxy that can route requests to ECS Fargate services, enabling synchronous service-to-service communication via RESTful or WebSocket APIs. It handles authentication, throttling, and request transformation, making it a suitable mechanism for external or internal service calls.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Amazon SQS queues between services
Why it's wrong here
SQS is for async messaging, not direct service communication.
- ✓
Amazon API Gateway as a front end
Why this is correct
API Gateway can route to internal services.
- ✓
Application Load Balancer (ALB) as a service mesh
Why this is correct
ALB can route traffic to multiple services.
- ✓
AWS Cloud Map service discovery
Why this is correct
Cloud Map provides DNS-based service discovery for ECS.
- ✗
Amazon DynamoDB as a communication channel
Why it's wrong here
DynamoDB is a database, not for communication.
Go deeper
Related to this question
About these practice questions
This SAP-C02 question is part of Courseiva's 1,660-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SAP-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SAP-C02 exam.