Microservices Concepts

Principles, pros/cons, boundaries, and deployment models.

Eureka/Consul basics and client-side vs server-side discovery.

Routing, aggregation, auth offloading with Spring Cloud Gateway.

REST, events, commands, and when to use each.

Circuit breaker, retry, fallback, timeouts, bulkheads, and rate limits.

Spring Cloud Config, profiles, secrets, and refresh.

Topics/queues, producers/consumers, retries and DLQs.

Metrics (Micrometer), logs, and tracing (OpenTelemetry).

Saga, outbox/inbox, idempotency, and eventual consistency.