Data Structures and Algorithms with Python | Free DSA with Python Course - DSA Python - Breadth First Search (BFS) in Graph | Queue + Visited Logic | GFG - Part 120 [Hindi]

🚀 Welcome to Part 120 of Code & Debug’s DSA Python Course 2025! In this lecture, we solve the Breadth First Search (BFS) Traversal problem from GeeksforGeeks, using a queue + visited array technique. BFS is one of the most fundamental algorithms used in graph traversal, shortest paths, and connected components. 📚 What you’ll learn in this video: ✅ What is Breadth First Search and where it is used ✅ BFS traversal using queue (FIFO) and visited tracking ✅ Difference between BFS in graphs vs. trees ✅ Real-world analogy: exploring nodes level by level ✅ Time & space complexity analysis 💡 Why is this important? BFS is the building block for advanced algorithms like Dijkstra’s, Prim’s, Topological Sort, and Flood Fill. It’s also a must-know technique for solving problems like shortest path in unweighted graphs, multi-source traversal, and component discovery. 👉 Practice the problem on GeeksforGeeks: 🔗 https://geeksforgeeks.org/problems/bfs-traversal-of-graph/1 👉 Refer to the article for better understanding: 📌 https://codeanddebug.in/blog/breadth-first-search-in-graph/ 👉 📄 Access the full YouTube DSA Playlist Sheet (All Questions in Order): 🔗 https://docs.google.com/spreadsheets/d/1AWE15Fy3wD2iqu2vjK_R7cCiuvSsjYQclcdZmHpF66o/edit?usp=sharing 👉 Enroll in this FREE DSA Python course here: 🔗 https://codeanddebug.in/course/master-dsa-with-leetcode 👉 Enroll for Self-Paced Advanced DSA course here: 🔗 https://codeanddebug.in/course/zero-to-hero-python-dsa 🙏 Thank you for supporting Code & Debug! Don’t forget to like, share, and subscribe to our channel. Hit the 🔔 bell icon to stay updated with our latest lectures. #BFS #GraphTraversal #GeeksforGeeks #GraphAlgorithms #PythonDSA #DSAPythonCourse #CodeAndDebug #DSA2025 #QueueTraversal #UnweightedGraphs #Part120 #CodingInterviews