Difference Between BFS and DFS

1. What is difference between BFS and DFS?
2. What is BFS and DFS with example?
3. When should we use DFS and BFS?
4. What is the difference between BFS and the best first search?
5. Why BFS takes more memory than DFS?
6. What are the applications of BFS and DFS?
7. How do I solve DFS and BFS?
8. Is backtracking DFS or BFS?
9. What is BFS algorithm example?
10. Which between DFS and BFS can find a vertex first?
11. Why does BFS find the shortest path?
12. Does DFS find shortest path?

What is difference between BFS and DFS?

BFS, stands for Breadth First Search. DFS, stands for Depth First Search. BFS uses Queue to find the shortest path. DFS uses Stack to find the shortest path.

What is BFS and DFS with example?

BFS stands for Breadth First Search. DFS stands for Depth First Search. 2. BFS(Breadth First Search) uses Queue data structure for finding the shortest path. ... BFS can be used to find single source shortest path in an unweighted graph, because in BFS, we reach a vertex with minimum number of edges from a source vertex.

When should we use DFS and BFS?

Depth First Search is commonly used when you need to search the entire tree. It's easier to implement (using recursion) than BFS, and requires less state: While BFS requires you store the entire 'frontier', DFS only requires you store the list of parent nodes of the current element.

What is the difference between BFS and the best first search?

Best-first search is informed whereas Breadth-first search is uninformed, as in one has a metal detector and the other doesn't! Breadth-first search is complete, meaning it'll find a solution if one exists, and given enough resources will find the optimal solution.

Why BFS takes more memory than DFS?

For implementation, BFS uses a queue data structure, while DFS uses a stack. BFS uses a larger amount of memory because it expands all children of a vertex and keeps them in memory. It stores the pointers to a level's child nodes while searching each level to remember where it should go when it reaches a leaf node.

What are the applications of BFS and DFS?

Using GPS navigation system BFS is used to find neighboring places. In networking, when we want to broadcast some packets, we use the BFS algorithm. Path finding algorithm is based on BFS or DFS. BFS is used in Ford-Fulkerson algorithm to find maximum flow in a network.

How do I solve DFS and BFS?

Algorithm

1. Step 1: SET STATUS = 1 (ready state) for each node in G.
2. Step 2: Enqueue the starting node A. and set its STATUS = 2. (waiting state)
3. Step 3: Repeat Steps 4 and 5 until. QUEUE is empty.
4. Step 4: Dequeue a node N. Process it. ...
5. Step 5: Enqueue all the neighbours of. N that are in the ready state. ...
6. Step 6: EXIT.

Is backtracking DFS or BFS?

When the search space of a problem is visited by backtracking, the implicit tree gets traversed and pruned in the middle of it. ... So, backtracking is DFS for implicit tree, while DFS is backtracking without pruning.

What is BFS algorithm example?

Example BFS Algorithm

You have a graph of seven numbers ranging from 0 – 6. 0 or zero has been marked as a root node. 0 is visited, marked, and inserted into the queue data structure. Remaining 0 adjacent and unvisited nodes are visited, marked, and inserted into the queue.

Which between DFS and BFS can find a vertex first?

The major difference between BFS and DFS is that BFS proceeds level by level while DFS follows first a path form the starting to the ending node (vertex), then another path from the start to end, and so on until all nodes are visited.

Why does BFS find the shortest path?

We say that BFS is the algorithm to use if we want to find the shortest path in an undirected, unweighted graph. The claim for BFS is that the first time a node is discovered during the traversal, that distance from the source would give us the shortest path. The same cannot be said for a weighted graph.

Does DFS find shortest path?

There are several differences between DFS and BFS (short answer: Both of them can find the shortest path in the unweighted graph). Both BFS and DFS will give the shortest path from A to B if you implemented right.