COMPUTER SCIENCE AND ENGINEERING
DATA STRUCTURES
Question
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Each node has exactly two children


Each node has exactly zero or two children


All the leaves are at the same level


Each node has exactly one or two children

Detailed explanation1: A full binary tree.is a binary tree in which each node has exactly zero or two children. A complete binary tree is a binary tree, which is completely filled, with the possible exception of the bottom level, which is filled from left to right.
Detailed explanation2: A Tree in which each node has exactly zero or two children is called full binary tree. A Tree in which the degree of each node is 2 except leaf nodes is called perfect binary tree.
Detailed explanation3: In other terms, a full binary tree is a binary tree in which all nodes, except the leaf nodes, have two offspring. A Full Binary Tree. Let, i be the number of internal nodes. n be the total number of nodes. l be number of leaves.
Detailed explanation4: Explanation: A full binary tree (sometimes proper binary tree or 2tree or strictly binary tree) is a tree in which every node other than the leaves has two children.
Detailed explanation5: A general tree is a tree where each node may have zero or more children. The other types of trees are special cases of general trees. Mathematically it can be defined as a finite nonempty set of elements.