Tata Consultancy Services System Engineer interview questions

🔹 Microservices / Architecture What are microservices? Independent, loosely-coupled services that communicate over APIs. Event-driven architecture Services communicate via events using Kafka or queues. Service discovery Finding services dynamically using tools like Consul, Eureka, or Kubernetes DNS. Circuit breaker Stops calling a failing service to prevent system collapse. Idempotency Ensures repeated requests give the same result (important for payments).