Question: What is the role of the \'visited\' set in Dijkstra\'s algorithm?

Options:

1. To keep track of the nodes that have been processed
2. To store the shortest path distances
3. To maintain the priority queue
4. To count the number of edges

Correct Answer: To keep track of the nodes that have been processed

Solution:

The \'visited\' set in Dijkstra\'s algorithm keeps track of the nodes that have already been processed to avoid reprocessing them.