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DSA Puzzles vs Real Software Engineering

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Python
Generators, Decorators, Context Managers & Async
C++ Systems
RAII, Smart Pointers, Move Semantics & Memory
JavaScript / TS
Closures, Event Loop, Currying & Strict Types
Java Enterprise
OOP Architecture, Interfaces & Clean Patterns
C & Pointers
Pointer Arithmetic, Dynamic Allocations & Buffers
SQL & Database
Window Functions, CTEs, Joins & Optimization
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