In a decision tree, the very first question or top node is known as the

In a decision tree, the very first question or top node is known as the

• A. Root
• B. Leaf
• C. Node
• D. Branch

Answer: (A)

The top node in a decision tree is called the root. It represents the starting point of the decision process, the first test to be applied, from which all other nodes descend. The root has no parent, and following the branches from it leads through subsequent tests until a final outcome is reached at a leaf. Leaves are the final predictions, internal nodes are decision points or tests, and branches are the connections that show the possible results of a test. For example, a top-level test like “Is income greater than 50k?” would sit at the root, with branches for the yes and no outcomes guiding you to the next tests or to a final decision.

The top node in a decision tree is called the root. It represents the starting point of the decision process, the first test to be applied, from which all other nodes descend. The root has no parent, and following the branches from it leads through subsequent tests until a final outcome is reached at a leaf. Leaves are the final predictions, internal nodes are decision points or tests, and branches are the connections that show the possible results of a test. For example, a top-level test like “Is income greater than 50k?” would sit at the root, with branches for the yes and no outcomes guiding you to the next tests or to a final decision.