He stood up. "To keep latency low and connection overhead manageable," Elian started, drawing a box, "I’m going to rule out Long Polling immediately due to the HTTP overhead. Given the unidirectional nature of stock data (server to client), Server-Sent Events (SSE) is viable, but since we need high concurrency and potentially bidirectional control later, I propose WebSockets."
"How would you handle exactly-once delivery in a distributed payment system?"
Before hunting for the file, you need to understand why Volume 1 wasn't enough. Alex Xu released to address the increasing complexity of modern interviews.