In a BST, if a node has no children, it is known as a ______.root nodeleaf nodeinternal nodesubnode

Break Down the Problem

1. Identify the types of nodes in a Binary Search Tree (BST).
2. Understand the terminology used in the context of BST.

Relevant Concepts

• Root Node: The topmost node in a tree.
• Leaf Node: A node that does not have any children (i.e., it is a terminal node).
• Internal Nodes: Nodes that have at least one child.
• Subnode: A less common term that can refer to any child node of a parent.

Analysis and Detail

• The question asks specifically about a node in a BST that has no children.
• Based on the definitions:
  • A leaf node perfectly fits this definition, as it indicates a node that does not extend further down the tree.

Verify and Summarize

• Reviewing the definitions confirms that a node with no children must be a leaf node. Therefore, the appropriate term is certainly indicated.

Final Answer

In a BST, if a node has no children, it is known as a leaf node.