In a tree, a node without parent is called a/an

Keep practicing — related questions

• Which of the following elements of a tree is a node which has both a parent and at least one child node?
• ______________ is a tree in which each leaf node is at the same distance from the root.
• In a tree, the number of direct children of any node is called
• A tree data structure has 100 nodes. What is the number of nodes in this tree having no ancestor?
• The number of leaf nodes in a rooted tree of n nodes, with each node having 0 or 3 children is:
• What is the level of root node of a tree?
• A binary tree whose every node has either zero or two children is called
• The tree traversal technique in which the root is traversed before its children is known as