Microservices Study Guide 2026
Everything you need to pass the Microservices exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 Microservices Exam Format at a Glance
📚 Microservices Topics to Study (63)
✍️ Sample Microservices Questions & Answers
1. What is the purpose of a smoke test after deployment?
Smoke tests quickly verify that the most important functionality works right after deployment.
2. A team wants each service to be independently deployable. What must be avoided?
Independent deployability requires loose coupling, so shared compile-time dependencies must be avoided.
3. Which schema evolution practice keeps event consumers from breaking?
Adding optional fields preserves backward compatibility for existing consumers.
4. Why is it important to identify business functions of applications and map similar functions across all of your applications in a microservices strategy?
A core principle of microservices is to organize services around distinct business capabilities. By identifying and mapping business functions, organizations can define clear boundaries for each microservice, ensuring that each service is cohesive, independently deployable, and responsible for a specific business domain. This approach helps in designing effective and maintainable microservices that align directly with business needs.
5. Why should secrets be injected at runtime rather than baked into container images?
Baking secrets into images exposes them in layers and registries; runtime injection keeps them out of the artifact.
6. Which technique reads a database's transaction log to capture and stream data changes?
CDC tools like Debezium tail the transaction log to emit change events to other services.