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: Utilizing trie data structures for prefix lookups. hacking the system design interview pdf download 2021

Focus on the : Load balancing, Caching, Sharding, and Proxies. Once you master these, any system—from a simple URL shortener to a global Video Streaming platform—becomes manageable.

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What features must the system support? (e.g., "Users can upload videos" or "Users can view a real-time newsfeed").

Entry point handling authentication, rate limiting, and request routing.

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Every non-failing node returns a non-error response (without guaranteeing it contains the most recent write).

Never jump straight into drawing boxes. Start by asking clarifying questions to establish functional and non-functional requirements.