Unsourced material download data structure book pdf be challenged and removed. 7 has two children, labeled 2 and 6, and one parent, labeled 2.
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The root node, at the top, has no parent. There is more than one root. A is the root but it also has a parent. A tree is a data structure made up of nodes or vertices and edges without having any cycle. A tree that is not empty consists of a root node and potentially many levels of additional nodes that form a hierarchy.
The top node in a tree. A node directly connected to another node when moving away from the Root. A group of nodes with the same parent. A node reachable by repeated proceeding from parent to child. A node reachable by repeated proceeding from child to parent. A node with no children.