BFS Interview Questions


A Breadth-first search (BFS) is an algorithm for traversing or searching tree or graph data structures. It starts at the tree root (or some arbitrary node of a graph, sometimes referred to as a ‘search key’) and explores the neighbor nodes first, before moving to the next level neighbors.

Below image shows order in which the nodes are expanded in BFS –



Below is the list of commonly asked interview questions that can be solved using BFS –



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