"Visual Guide to DSA: Big O Notation, Data Structures, and Algorithms Fundamentals"

This document contains essential DSA Notes—a visual guide to Data Structures and Algorithms fundamentals, perfect for coding interview preparation. Master the core concepts, starting with Big O Notation 1to accurately measure Time Complexity ($O(1)$, $O(n)$, $O(n^2)$)222222222. You will find clear breakdowns of Arrays and Linked Lists 3, plus explanations for efficient structures like the Stack (LIFO) 4and Queue (FIFO)5. The notes also cover the Hash Table (average $O(1)$ lookup) 6with collision handling (chaining), the Binary Heap (Max Heap) 7, and the fast-lookup Binary Search Tree (BST) (average $O(\log n)$).