# Hacktivateed

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## Which data structure has a root node?

In the Tree data structure, the topmost node is known as a root node. Each node contains some data, and data can be of any type.

### Which is the root node of above tree?

The top-level node i.e. the root node is present at level 1 and all the other nodes may be present at various levels. A General Tree is shown in the below figure. As shown in the above figure, a general tree may contain any number of subtrees. The nodes B, C, and D are present at level 2 and are sibling nodes.

#### Which of the node is considered as root node?

A root node is either the topmost or the bottom node in a tree data structure, depending on how the tree is represented visually. The root node may be considered the top if the visual representation is top-down or the bottom if it is bottom-up.

What is root node in binary tree?

A binary tree is a tree-type non-linear data structure with a maximum of two children for each parent. Every node in a binary tree has a left and right reference along with the data element. The node at the top of the hierarchy of a tree is called the root node. The nodes that hold other sub-nodes are the parent nodes.

What is root node with example?

The root node is the highest node in the tree structure, and has no parent. This node is a global element and represents the entire message. It may have one or more child nodes, but can never have sibling nodes or be repeating. The name of the root node can be edited. Previous: Parent, Child, and Sibling Nodes.

## What is node data structure?

Nodes are a basic data structure which contain data and one or more links to other nodes. Nodes can be used to represent a tree structure or a linked list. In such structures where nodes are used, it is possible to traverse from one node to another node.

### What is the degree of a node?

The degree of a node is the number of connections that it has to other nodes in the network. In a social network if you have 100 friends then the node that represents you has a degree of 100. Path length is simply the distance between two nodes, measured as the number of edges between them.

#### How many different trees are possible with N nodes?

In general: If there are n nodes, there exist 2^n-n different trees.

What is root node and leaf node with example?

Terminology summary Root is the topmost node of the tree. Edge is the link between two nodes. Child is a node that has a parent node. Parent is a node that has an edge to a child node. Leaf is a node that does not have a child node in the tree.

What is perfect tree?

A perfect binary tree is a type of binary tree in which every internal node has exactly two child nodes and all the leaf nodes are at the same level. Perfect Binary Tree. All the internal nodes have a degree of 2.

## What is a node data structure?

### What is head node?

In simple terms a head node, sometimes identified as a login node, is a configured system that sits in a Rack as part of a cluster and act as a Master node for the whole cluster in which case it becomes the single point for managing all the computational resources.

#### Which is the root node in a tree?

The root node may be considered the top if the visual representation is top-down or the bottom if it is bottom-up. The analogy is that the tree starts at the roots and then goes up to its crown, so the first node is considered the root. In a tree data structure, the root node is the very first or parent node.

What does node mean in a data structure?

A node is a structure which may contain a value or condition, or represent a separate data structure (which could be a tree of its own). Each node in a tree has zero or more child nodes, which are below it in the tree (by convention, trees are drawn growing downwards).

Which is the topmost node in a binary tree?

Hashing, routing data for network traffic, data compression, preparing binary heaps, and binary search trees are some of the applications that use a binary tree. Node: It represents a termination point in a tree. Root: A tree’s topmost node.

## Which is the connecting link between two nodes?

In a tree data structure, the connecting link between any two nodes is called as EDGE. In a tree with ‘ N ‘ number of nodes there will be a maximum of ‘ N-1 ‘ number of edges. 3. Parent In a tree data structure, the node which is a predecessor of any node is called as PARENT NODE.