Binary Tree Implementation Guide

Binary Tree Implementation Essentials

Node Structure

class TreeNode {
    int data;
    TreeNode left;
    TreeNode right;
}

Key Operations to Remember

• Insert: Always maintain BST property (left < parent < right)
• Delete: Three cases - leaf, one child, two children
• Search: Recursive or iterative, O(log n) for balanced trees

Common Interview Patterns

1. Tree traversal (DFS vs BFS)
2. Finding height/depth
3. Checking if balanced
4. Finding LCA (Lowest Common Ancestor)
5. Serialization/Deserialization

Remember: Most tree problems can be solved recursively!