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Question 39 of 50

Part 4: API Design, Security & Edge Networking (37 - 43)

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System Design (50 Qs)•Part 4: API Design, Security & Edge Networking (37 - 43)

WebSockets vs Server-Sent Events (SSE) vs Long Polling.

In Simple Words:

  • WebSockets: Full-duplex bidirectional TCP communication. Best for gaming, collaborative editing, and chat.
  • Server-Sent Events (SSE): Unidirectional server-to-client streaming over standard HTTP. Built-in reconnection. Best for live stock tickers, LLM streaming output, and notifications.
  • Long Polling: Legacy fallback where client holds an HTTP request open until the server responds.
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