Real Time Data and WebSocket Integration Questions

Design and implement real time experiences that keep frontend state synchronized with backend changes. Topics include WebSocket and server sent event options, connection lifecycle and reconnection strategies with backoff and jitter, heartbeats and health checks, message ordering and idempotency, batching and backpressure management, optimistic UI updates and conflict resolution, authentication and security for persistent connections, and testing and observability for real time systems. Candidates should discuss trade offs between latency, reliability, complexity, and server cost.