Microservices Communication u0026 API Design Quiz Quiz

1. API Gateway Pattern

   What is the primary benefit of using an API Gateway in a microservices architecture?

   1. Direct database access for each microservice.
   2. Centralized point for request routing, authentication, and rate limiting.
   3. Eliminates the need for inter-service communication.
   4. Decentralized message queuing.
   5. Simplifies individual microservice deployment by removing security concerns.

2. Asynchronous Communication

   Which messaging pattern is most suitable for loosely coupled, asynchronous communication between microservices where the sender does not require an immediate response?

   1. RESTful HTTP calls.
   2. Direct RPC (Remote Procedure Call).
   3. Message Queue (e.g., RabbitMQ, Kafka).
   4. Synchronous database transactions.
   5. GraphQL subscription.

3. RESTful API Design

   In RESTful API design for microservices, what HTTP status code typically indicates a successful creation of a new resource?

   1. 200 OK
   2. 201 Created
   3. 400 Bad Request
   4. 500 Internal Server Error
   5. 302 Found

4. Service Discovery

   What is the purpose of a service discovery mechanism in a microservices environment?

   1. To automatically scale individual microservices.
   2. To enable microservices to locate and communicate with each other dynamically.
   3. To manage the deployment pipeline.
   4. To monitor the CPU usage of each microservice.
   5. To consolidate all microservice logs into a single location.

5. Circuit Breaker Pattern

   Why is the Circuit Breaker pattern important when designing communication between microservices?

   1. To encrypt all network traffic.
   2. To prevent cascading failures by stopping requests to failing services.
   3. To automatically restart crashed microservices.
   4. To load balance traffic between microservices.
   5. To compress the request payload for faster delivery.

6. Idempotency in APIs

   What does it mean for an API endpoint to be idempotent?

   1. The endpoint can only be called once.
   2. Multiple identical requests to the endpoint have the same effect as a single request.
   3. The endpoint always returns the same result, regardless of the input.
   4. The endpoint requires user authentication.
   5. The endpoint is only available for internal use.

7. gRPC vs. REST

   Which of the following is a key advantage of using gRPC over REST for inter-microservice communication?

   1. Native support in all web browsers.
   2. Human-readable JSON format.
   3. Uses HTTP/1.1 protocol.
   4. More efficient serialization with Protocol Buffers.
   5. Automatic generation of RESTful documentation.

8. Data Consistency

   In a microservices architecture, what is the eventual consistency model and when is it typically acceptable?

   1. All data changes must be immediately consistent across all services.
   2. Data will eventually become consistent, and is acceptable for operations that don't require immediate consistency.
   3. Data is never guaranteed to be consistent.
   4. Data consistency is only relevant for financial transactions.
   5. Each microservice maintains its own consistent view of the data.

9. Saga Pattern

   What is the Saga pattern used for in a microservices architecture?

   1. Managing distributed transactions across multiple microservices.
   2. Centralized logging of all microservice events.
   3. Performing complex data aggregations across services.
   4. Implementing a micro front end design.
   5. Enforcing security policies across all services.

10. Contract Testing

    What is the purpose of contract testing in the context of microservices API design?

    1. To test the performance of individual microservices.
    2. To verify that a consumer of an API adheres to the contract defined by the provider.
    3. To test the end-to-end functionality of the entire system.
    4. To automatically generate API documentation.
    5. To ensure that all microservices use the same database schema.