Can I focus only on FAANG or only on startups?
You can target one, but strong developers cover both. Fundamentals without practical building fail at startups; practical building without fundamentals fails at FAANG. Aim to be strong in both, since the market can shift and you want options.
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FAANG leans on fundamentals, depth, and DSA: hooks internals, performance, complex state, and architecture. Startups lean on practical building: machine coding, real API integration, auth, real-time, and deployment. Both test different skills.
Deep questions on hooks rules and internals, re-renders and performance with measurement, complex state management, library trade-offs like Redux vs Context, and architecture. FAANG values fundamentals and engineering judgment, plus DSA alongside React.
Practical building: building UIs from scratch under time, real API integration, auth and real-time features, and shipping. Machine coding rounds are common, and they value day-one productivity over deep fundamentals alone.
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