DSA | PYTHON | JAVA | C++ | RUBY | SQL | JAVASCRIPT | MEME on Instagram: "Backend Developer – Must-Know below Things 👇 1. Programming Fundamentals o Variables, functions, OOP concepts o Error / exception handling o Data structures (arrays, maps, sets) o Concurrency & async basics o Memory & execution flow (high level) 2. API Development o REST principles o HTTP methods (GET, POST, PUT, DELETE) o HTTP status codes o Request / response design o Pagination, filtering, sorting 3. Databases o SQL ba

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