题目内容

For the following problems, decide whether it would be better to perform supervised or unsupervised learning given the data.100,000 emails are read and marked as spam or not spam, depending on some metrics measured on their content(keywords, length, etc). We want to determine what a new email will be marked as.

A. Supervised
B. Unsupervised

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Regardless of node priority, BFS will always run at least as fast as Shortest Path DFS on two nodes in any connected unweighted graph.

If a BFS and Shortest Path DFS prioritize the same nodes (e.g., both always choose to explore the lower numbered node first), BFS will always run at least as fast as Shortest Path DFS when run on two nodes in any connected unweighted graph.

If a BFS and DFS prioritize the same nodes (e.g., both always choose to explore the lower numbered node first), BFS will always run at least as fast as DFS when run on two nodes in KN.

BFS will always run faster than DFS.