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GATE | GATE CS 2012 | Question 38

  • Difficulty Level : Medium
  • Last Updated : 14 Feb, 2018

Consider the directed graph shown in the figure below. There are multiple shortest paths between vertices S and T. Which one will be reported by Dijstra?s shortest path algorithm? Assume that, in any iteration, the shortest path to a vertex v is updated only when a strictly shorter path to v is discovered.


Answer: (D)


Background Required –  Dijkstra’s Single Source Shortest Path Algorithm
Explanation – Applying  Dijkstra’s algorithm to compute the shortest distances from S and finally generating the Tree as given below in the diagram.




This solution is contributed by Pranjul Ahuja.


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