The BFS Graph Traversal Algorithm in Java Learn how to implement a BFS graph traversal algorithm so you know how to tackle it in your next programming interview. by Join the DZone community and get the full member experience.Join For Free Graphs are one of the most common questions that might show up in a technical interview, especially in these days where many real-world applications can be represented by nodes and edges such as the social networks! There are hundreds of graph questions that can show up in a programming interview, luckily there are only a handful of algorithms we need to really understand that will help us solve most of them.