What are the differences between various graph algorithms?

What are the main differences between Dijkstra's and A* algorithms?

Dijkstra's algorithm finds the shortest path from a single source to all nodes, while A* uses heuristics to optimize pathfinding.

Can you explain when to use Breadth-First Search over Depth-First Search?

Use BFS when you need the shortest path in an unweighted graph, and DFS when you want to explore all paths or need to find a solution quickly.

What are the time complexities of these algorithms?

Dijkstra's algorithm has a time complexity of O(V^2) or O(E + V log V) with a priority queue, while A* depends on the heuristic used.

Are there any scenarios where one algorithm is significantly better than the others?

Yes, A* is often better for pathfinding in games due to its heuristic, while BFS is ideal for finding the shortest path in unweighted graphs.