Question

the root node is also called as ............. ​

Answer 1

Explanation:

Root − The node at the top of the tree is called root. There is only one root per tree and one path from the root node to any node. Parent − Any node except the root node has one edge upward to a node called parent. Child − The node below a given node connected by its edge downward is called its child node.

Answer 2

Answer:

topmost node

Explanation:

The topmost node in a tree is called the root node. Depending on the definition, a tree may be required to have a root node (in which case all trees are non-empty), or may be allowed to be empty, in which case it does not necessarily have a root node. Being the topmost node, the root node will not have a parent.