advancedWhatsApp Deep Dive30 of 132
How would you design WhatsApp's message delivery system to ensure no message is ever lost?
Tests whether you can combine acknowledgments, persistent queuing, and retry logic into a genuinely reliable delivery guarantee.
Ready to design this system end to end?
Generate a complete, structured system design answer — requirements, capacity estimation, API design, architecture, database choice, scaling, caching, fault tolerance, security, trade-offs, and more, walked through the way a strong senior engineer would in a real interview.
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