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In which scenario would you prefer using Dijkstra's algorithm over A* search alg

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Question: In which scenario would you prefer using Dijkstra\'s algorithm over A* search algorithm?

Options:

  1. When you need to find the shortest path in a grid
  2. When the heuristic is not available
  3. When the graph has negative weights
  4. When you need to find all paths

Correct Answer: When the heuristic is not available

Solution:

Dijkstra\'s algorithm is preferred when there is no heuristic available, as A* relies on heuristics to guide its search.

In which scenario would you prefer using Dijkstra's algorithm over A* search alg

Practice Questions

Q1
In which scenario would you prefer using Dijkstra's algorithm over A* search algorithm?
  1. When you need to find the shortest path in a grid
  2. When the heuristic is not available
  3. When the graph has negative weights
  4. When you need to find all paths

Questions & Step-by-Step Solutions

In which scenario would you prefer using Dijkstra's algorithm over A* search algorithm?
  • Step 1: Understand what Dijkstra's algorithm does. It finds the shortest path from a starting point to all other points in a graph.
  • Step 2: Understand what A* search algorithm does. It also finds the shortest path but uses a heuristic to estimate the distance to the goal.
  • Step 3: Identify when you have a heuristic. If you have a good estimate of the distance to the goal, A* is usually better.
  • Step 4: Identify when you do not have a heuristic. If you don't have any information to estimate the distance to the goal, you cannot use A* effectively.
  • Step 5: Conclude that in scenarios without a heuristic, Dijkstra's algorithm is preferred because it will still find the shortest path without needing extra information.
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