First Move (11~18) - Code, Learn, Build
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First Move (11~18) - Code, Learn, Build

Structured, level-based technology learning paths from foundational exploration to industry mastery.

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  • Python Programming (Active)
  • Computer Science Core
  • Web Development
  • AI & Machine Learning

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← Data Structures & Algorithms|Level 2: Trees, Graphs & Searching Algorithms

4. Graph Traversals: Breadth-First Search (BFS) & Depth-First Search (DFS)

Lesson 4 of 7
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Graph Traversals: Breadth-First Search (BFS) & Depth-First Search (DFS)

Represent graphs using Adjacency Lists, search shortest paths using BFS queue traversal, and explore component paths using DFS recursion stack.

Graph Search Mechanics

### BFS vs DFS Algorithms - **Breadth-First Search (BFS)**: Level-by-level queue traversal. Guarantees finding the **shortest path** in unweighted graphs. Time: $O(V + E)$. - **Depth-First Search (DFS)**: Deep branch exploration using recursive call stack or explicit stack. Ideal for topological sort and cycle detection.
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