## What is inorder successor and predecessor in binary tree?

When you do the inorder traversal of a binary tree, the neighbors of given node are called Predecessor(the node lies behind of given node) and Successor (the node lies ahead of given node).

### What is the order of binary search tree?

A BST can be traversed through three basic algorithms: inorder, preorder, and postorder tree walks. Inorder tree walk: Nodes from the left subtree get visited first, followed by the root node and right subtree.

**What does it mean for a binary search tree to be balanced?**

A balanced binary tree, also referred to as a height-balanced binary tree, is defined as a binary tree in which the height of the left and right subtree of any node differ by not more than 1.

**What makes a tree balanced?**

A tree is perfectly height-balanced if the left and right subtrees of any node are the same height. e.g. It is clear that at every level there are twice as many nodes as at the previous level, so we do indeed get H = O(logN).

## What is preorder successor?

If left child of given node exists, then the left child is preorder successor. If left child does not exist and given node is left child of its parent, then its sibling is its preorder successor.

### Does a binary search tree have to be balanced?

Binary search trees A balanced binary search tree is additionally balanced. The definition of balanced is implementation-dependent. In red black trees, the depth of any leaf node is no more than twice the depth of any other leaf node. In AVL trees, the depth of leaf nodes differ by at most one.

**What is the order of nodes in in order traversal?**

InOrderTraversal : The idea of inorder traversal is that we visit the nodes in the order left-root-right, meaning for any subtree in the path, left node must be visited first followed by root and right node.

**What is balanced and unbalanced binary search tree?**

A balanced binary tree is one in which no leaf nodes are ‘too far’ from the root. For example, one definition of balanced could require that all leaf nodes have a depth that differ by at most 1. An unbalanced binary tree is one that is not balanced.

## Which binary tree height is balanced?

A binary tree is balanced if the height of the tree is O(Log n) where n is the number of nodes. For Example, the AVL tree maintains O(Log n) height by making sure that the difference between the heights of the left and right subtrees is at most 1.

### Is a complete binary tree balanced?

Every complete binary tree is balanced but not the other way around. As implies, in a complete tree, always the level difference will be no more than 1 so it is always balanced.

**What properties of a balanced binary search tree are true?**

Balanced binary trees A binary tree is balanced if each node has (roughly) the same number of descendants in its left subtree as it has in its right subtree. Important fact: For balanced binary trees, the height is proportional to the base-two logarithm of the number of nodes in the tree: h = O(lg(n)).

**What is in order predecessor?**

The inorder predecessor of a node p is the node q that comes just before p in the binary tree’s inorder traversal. Given the root node of a binary search tree and the node p , find the inorder predecessor of node p . If it does not exist, return null .

## What is preorder successor in Binary Tree?

Preorder Successor of a Node in Binary Tree in C++ Preorder Traversal is a way to traverse nodes of the tree. In this we will first traverse root node then left child and then the right child. Preorder successor node is the node that comes next to the node in the preorder traversal of the node.

### What node is the successor of node A?

2 Page 3 node A: Has a right child (node-C), so successor is the leftmost descendent of node-C, namely node-C itself.

**What is the sequence for inorder traversal of binary tree?**

Recall that the order for inorder traversal is Left, Root, Right.

**What is inorder traversal of the following tree?**

An inorder traversal technique follows the Left Root Right policy. Here, Left Root Right means that the left subtree of the root node is traversed first, then the root node, and then the right subtree of the root node is traversed.

## How does a balanced tree work?

A balanced binary search tree is a tree that automatically keeps its height small (guaranteed to be logarithmic) for a sequence of insertions and deletions. This structure provide efficient implementations for abstract data structures such as associative arrays.

### Do binary search trees have to be balanced?

**What is successor and predecessor?**

Predecessor and Successor are the two terms in Mathematics that are most commonly used for the series and sequence of whole numbers. The predecessor is known as before numbers (that appear just before) and the successor is known as after numbers (that appear just after).

**What will the pre order successor of the root node in a complete Binary Tree?**

## What will be the inorder successor of node 15?

It can be seen that 15’s successor is 17. In-order successor of a node is the minimum element in right subtree of the node in consideration. Here, in the right subtree of 15, 17 is the element with minimum value. Hence, 17 is 15’s in-order successor.

### What is inorder successor in binary tree?

In Binary Tree, Inorder successor of a node is the next node in Inorder traversal of the Binary Tree. Inorder Successor is NULL for the last node in Inorder traversal. In Binary Search Tree, Inorder Successor of an input node can also be defined as the node with the smallest key greater than the key of the input node.

**What are successors in tree?**

The successors of a node are called its children; the unique predecessor of a node is called its parent. If two nodes have the same parent, they are called brothers or siblings. In a binary tree the two children are called the left and right.