In a binary tree, if a node has two children, how many nodes are there in its su

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Question: In a binary tree, if a node has two children, how many nodes are there in its subtree?

Options:

Correct Answer: 3

Solution:

If a node has two children, there are at least 3 nodes in its subtree (the node itself and its two children).

In a binary tree, if a node has two children, how many nodes are there in its subtree?

In a binary tree, if a node has two children, how many nodes are there in its subtree?

Step 1: Understand what a binary tree is. A binary tree is a structure where each node can have up to two children.
Step 2: Identify the node in question. Let's call this node 'A'.
Step 3: Recognize that if node 'A' has two children, it means it has a left child and a right child.
Step 4: Count the nodes in the subtree. The subtree includes node 'A' itself and its two children.
Step 5: Add them up: 1 (for node 'A') + 1 (for the left child) + 1 (for the right child) = 3.
Step 6: Conclude that if a node has two children, there are at least 3 nodes in its subtree.

Binary Tree Structure – Understanding the basic structure of a binary tree, where each node can have up to two children.
Subtree Definition – Recognizing that a subtree includes the node itself and all its descendants.