Tree Node.

For the "Tree Node" question, focus on your understanding of data structures, specifically binary trees. Be prepared to define what a tree node is, including its properties such as value, left child, and right child. Discuss how you would implement a tree node in a programming language of your choice, and consider edge cases like null nodes. Additionally, think about how tree nodes can be used in various algorithms, such as traversal methods (in-order, pre-order, post-order) or search operations.