Grokking Modern Mobile System Design Interview
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Real Time Transports
Real-time features try to show changes soon after they happen. Examples include new comments, chat messages, and a driver's location.
First define how recent the information needs to be. A transport choice alone does not guarantee freshness, delivery, or recovery.
Choose a transport for the required behavior
| Approach | How it works | Main consideration |
|---|---|---|
| Polling | The client asks for updates at intervals | Simple, but repeated requests can return no changes |
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