What is a crucial requirement for Dijkstra’s algorithm (for finding shortest path) to work correctly?Select one:a. All edge weights in the graph must be equal.b. The graph must be fully connected.c. The graph must be a tree.d. The graph must not contain any negative edge weights.
Question
What is a crucial requirement for Dijkstra’s algorithm (for finding shortest path) to work correctly?Select one:a. All edge weights in the graph must be equal.b. The graph must be fully connected.c. The graph must be a tree.d. The graph must not contain any negative edge weights.
Solution
The crucial requirement for Dijkstra’s algorithm to work correctly is:
d. The graph must not contain any negative edge weights.
Dijkstra's algorithm assumes that the cost to move from one vertex to another is always positive. If there are negative edge weights, the algorithm may not find the shortest path correctly. This is because it always selects the "cheapest" next vertex to visit, and if a negative edge weight is allowed, it could get stuck in an infinite loop where it continually reduces the cost of the path.
Similar Questions
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