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CCSP Practice Question: A developer is designing a microservices-based…
A developer is designing a microservices-based application in the cloud. They need to ensure communication between services is loosely coupled and resilient to failures. Which design pattern should they implement?
⚠ Common exam trap
ISC2 often tests the distinction between patterns that manage communication (like service mesh) versus patterns that decouple communication (like event-driven messaging), and the trap here is that candidates confuse a service mesh's ability to handle retries and circuit breakers with the fundamental loose coupling provided by asynchronous event-driven architectures.
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
✓
Event-driven messaging
Event-driven messaging (B) is correct because it enables asynchronous, decoupled communication between microservices, allowing them to operate independently and remain resilient to failures. When a service publishes an event, other services consume it at their own pace, preventing cascading failures and ensuring the system can handle partial outages without blocking. This pattern directly supports loose coupling and fault tolerance, which are critical for cloud-based microservices architectures.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
API gateway
Why it's wrong here
API gateway is typically used for external-facing services and does not guarantee loose coupling between internal services.
- ✓
Event-driven messaging
Why this is correct
Event-driven messaging uses asynchronous messages, enabling loose coupling and resilience to failures.
- ✗
Service mesh
Why it's wrong here
Service mesh manages service-to-service communication but does not inherently provide loose coupling.
- ✗
Database per service
Why it's wrong here
Database per service addresses data isolation, not communication coupling.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CCSP practice question is part of Courseiva's free ISC2 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 CCSP exam.