Question: Which of the following is a characteristic of hierarchical clustering?

Options:

1. It requires the number of clusters to be specified in advance
2. It can produce a dendrogram to visualize the clustering process
3. It is always faster than K-means
4. It only works with numerical data

Correct Answer: It can produce a dendrogram to visualize the clustering process

Solution:

Hierarchical clustering can produce a dendrogram, which is a tree-like diagram that shows the arrangement of the clusters.