DSA Roadmap
Before You Start DSA
Strengthen these fundamentals first — each card opens a full article.
Variables, Data Types & OperatorsPrimitives, type conversion, operators
›Conditionalsif / else / switch / ternary
›Loopsfor / while / nested loops
›FunctionsParameters, scope, return types
›RecursionBase case, call stack, tail recursion
›ArraysIndexing, 2D arrays, dynamic arrays
›StringsImmutability, methods, StringBuilder
›Objects / HashMapsKey-value pairs, iteration, hashing
›Time ComplexityBig O: O(1), O(n), O(n²)
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Prerequisites done?
Switch to Phase-wise Topics to begin your DSA journey!