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Which of the following problems can be efficiently solved using DFS?2 pointsFinding the shortest path between two vertices in a weighted graphDetecting cycles in a directed graphCalculating the minimum spanning tree of a graphFinding the maximum flow in a network flow graph

Question

Which of the following problems can be efficiently solved using DFS?2 pointsFinding the shortest path between two vertices in a weighted graphDetecting cycles in a directed graphCalculating the minimum spanning tree of a graphFinding the maximum flow in a network flow graph

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Solution

Detecting cycles in a directed graph can be efficiently solved using Depth-First Search (DFS).

DFS is a graph traversal algorithm that explores as far as possible along each branch before backtracking. It uses a stack data structure to remember to get the next vertex to start a search when a dead end occurs in any iteration.

In the context of detecting cycles in a directed graph, DFS can be used to track the vertices currently in the recursion stack of function for DFS traversal. If DFS reaches a vertex that is already in the recursion stack, then there is a cycle in the graph.

However, DFS is not efficient for finding the shortest path between two vertices in a weighted graph, calculating the minimum spanning tree of a graph, or finding the maximum flow in a network flow graph. Other algorithms such as Dijkstra's algorithm for shortest paths, Prim's or Kruskal's algorithm for minimum spanning trees, and the Ford-Fulkerson algorithm for maximum flow are more suitable for these problems.

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Similar Questions

What is the role of Depth-First Search (DFS) in graph traversal?A) Ensures shortest path between nodesB) Visits nodes depth-wise until no more unvisited nodes are leftC) Calculates the average distance between nodesD) Finds the maximum flow in a graph

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A DFS of a directed graph always produces the same number of tree edges, i.e., independent of the order in which vertices are considered for DFS. State true or false.a)Trueb)False

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