Microservices Microservices 2

Question 1

What is the primary purpose of an API gateway in a microservices architecture?

Accepted Answer

A single entry point that routes, aggregates, and secures requests to backend services

Answer

An API gateway acts as a single entry point handling routing, aggregation, authentication, and rate limiting.

Question 2

Which pattern helps prevent cascading failures when a downstream service is unresponsive?

Accepted Answer

Circuit breaker

Answer

The circuit breaker pattern stops calls to a failing service to avoid cascading failures.

Question 3

In the database-per-service pattern, each microservice should:

Accepted Answer

Own its private data store and not share it directly with other services

Answer

Each service owns its data privately, accessed only through its own API.

Question 4

What does service discovery solve in a dynamic microservices environment?

Accepted Answer

Locating network addresses of service instances that change frequently

Answer

Service discovery lets services find each other's dynamic network locations.

Question 5

Which communication style is asynchronous and decouples sender from receiver?

Accepted Answer

Message/event-based messaging via a broker

Answer

Message brokers enable asynchronous, decoupled communication between services.

Microservices Practice Test