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Everything you need to build a strong foundation in data structures, algorithms, and database concepts — explained visually.
Understand Big O notation, runtime analysis, and operation budgets for common algorithms.
Learn about memory usage, recursion stack depth, and how to estimate space requirements.
Master core data structures: arrays, linked lists, trees, tries, and graphs with visual explanations.
Deep-dive into 16 essential coding patterns: two pointers, sliding window, binary search, backtracking, dynamic programming, and more.
From SQL basics and JOINs to indexes, transactions, ACID properties, sharding, and advanced database internals.