Describe BFS and DFS

Question

Write down the difference between BFS and DFS?

Answer 1

BFS: This can be thought of as being such as Dijkstra's algorithm for shortest paths, however with each and every edge containing the same length. Though it is a lot simpler and does not require any data structures. We just keep a tree (that is, the breadth first search tree), a list of nodes to be added to tree and markings (Boolean variables) on the vertices to tell whether they are in the tree or list.

Depth first search is the other way of traversing graphs, which is closely associated to preorder traversal of a tree. Remember that preorder traversal just visits each node before its children. It is most simple to program as a recursive routine.