In a decision tree, the term node refers to which of the following?

• A. Leaf Only
• B. The Path From Root To A Leaf
• C. A Point Where A Test On An Attribute Is Performed
• D. The Final Prediction

Answer: (C)

Nodes mark decision points where an attribute is tested to split the data. Each internal node evaluates a condition on a feature and directs the instance along a branch based on the result. Leaves are the terminal points that hold the final prediction, not the decision points themselves. The path from root to a leaf describes a sequence of such decisions, but a node itself is specifically the place where a test is performed. That’s why the correct view is that a node represents a point where a test on an attribute is performed.