3 Interview Questions on Event-Driven Patterns

System Design interviews often test candidates on event-driven patterns such as Competing Consumer, Retry Messages, and Async Request-Response. The Competing Consumer Pattern allows multiple instances to process messages concurrently. The Retry Messages Pattern manages transient errors by retrying failed transactions with mechanisms like exponential backoff. The Async Request-Response Pattern involves using correlation IDs to relate requests and responses across multiple instances, ensuring asynchronous communication between services.