How do I show I understand the whole stack in an interview?
Be specific about all parts, not just the frontend. Explain how the pieces fit, the trade-offs you made, and what you would improve with more time. Interviewers want to see end-to-end understanding, not just one side.
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More FAQs in Full Stack React Project Questions Asked in Interviews
Describe the frontend, backend, database, and how they connect: React calls Express REST APIs, Express uses Mongoose to talk to MongoDB, and Socket.IO for real-time chat. Show you understand how all the pieces fit together.
Explain JWT issuance on login, storage on the frontend, middleware on protected routes that verifies the token, and token refresh. Be ready to discuss trade-offs like accessToken vs httpOnly cookies for security.
Explain your User, Connection, and Message schemas, the references between them, the indexes for the queries you run, and your embed vs reference decisions. Show you designed for the queries, not just for storage.
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