## Which algorithm is used for shortest path?

Dijkstra’s Algorithm

Well simply explained, an algorithm that is used for finding the shortest distance, or path, from starting node to target node in a weighted graph is known as Dijkstra’s Algorithm. This algorithm makes a tree of the shortest path from the starting node, the source, to all other nodes (points) in the graph.

## Which is a popular algorithm to find shortest path problem?

There are many algorithms that are used to find the shortest path in a graph, for example, Dijkstra’s algorithm is a popular algorithm.

**What are the applications of Dijkstra algorithm?**

Dijkstra’s algorithm is widely used in the routing protocols required by the routers to update their forwarding table. The algorithm provides the shortest cost path from the source router to other routers in the network.

### Which algorithm is best running time for shortest path?

Use the Floyd-Warshall algorithm if you want to find the shortest path between all pairs of vertexes, as it has a (far) higher running time than Dijkstra’s algorithm. In the meanwhile better algorithms for the single source shortest path problem are known.

### Can DFS be used to 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.

**How do you solve a shortest path problem?**

Dijkstra’s Algorithm

- Mark the ending vertex with a distance of zero. Designate this vertex as current.
- Find all vertices leading to the current vertex. Calculate their distances to the end.
- Mark the current vertex as visited.
- Mark the vertex with the smallest distance as current, and repeat from step 2.

## How does Dijkstra’s algorithm determine the shortest path?

Dijkstra’s algorithm to find the shortest path between a and b. It picks the unvisited vertex with the lowest distance, calculates the distance through it to each unvisited neighbor, and updates the neighbor’s distance if smaller. Mark visited (set to red) when done with neighbors.

## What are the limitation of Dijkstra’s shortest path algorithm?

The major disadvantage of the algorithm is the fact that it does a blind search there by consuming a lot of time waste of necessary resources. Another disadvantage is that it cannot handle negative edges. This leads to acyclic graphs and most often cannot obtain the right shortest path.

**Is Floyd warshall algorithm faster than Dijkstra?**

Dijkstra’s algorithm finds the shortest path between a single pair of nodes, while Floyd-Warshall finds the shortest paths between all pairs of nodes. One of my research students was working with sparse graphs and found that Dijkstra’s algorithm is faster.