A Tree is **a non-linear data structure where data objects are organized in terms of hierarchical relationship**. The structure is non-linear in the sense that, unlike simple array and linked list implementation, data in a tree is not organized linearly. Each data element is stored in a structure called a node.

## What are trees used for in Java?

**to represent hierarchical data**. For a real-world example, a hierarchical company structure uses a tree to organize.

## What is Java binary tree?

**a recursive data structure where each node can have 2 children at most**. A common type of binary tree is a binary search tree, in which every node has a value that is greater than or equal to the node values in the left sub-tree, and less than or equal to the node values in the right sub-tree.

## What is tree and its types?

**a type of data structure representing hierarchical data**. It has a non-linear structure consisting of nodes connected by edges. Among the other types of data structures that perform operations in a linear data structure, the complexity increases with an increase in data size.

## What is a tree in programming?

**a nonlinear data structure**, compared to arrays, linked lists, stacks and queues which are linear data structures. A tree can be empty with no nodes or a tree is a structure consisting of one node called the root and zero or one or more subtrees.

## What is static class in Java?

A static inner class is **a nested class which is a static member of the outer class**. It can be accessed without instantiating the outer class, using other static members. Just like static members, a static nested class does not have access to the instance variables and methods of the outer class.

## How do you create a graph in Java?

**GraphImplementation.java**

- import java.util.*;
- class Graph<T>
- {
- //creating an object of the Map class that stores the edges of the graph.
- private Map<T, List<T> > map = new HashMap<>();
- //the method adds a new vertex to the graph.
- public void addNewVertex(T s)
- {

## What Is linked list C++?

A linked list is **a collection of nodes that contain a data part and a next pointer that contains the memory address of the next element in the list**. The last element in the list has its next pointer set to NULL, thereby indicating the end of the list. The first element of the list is called the Head.

## How do you make a tree in Python?

To insert into a tree we **use the same node class created above and add a insert class to it**. The insert class compares the value of the node to the parent node and decides to add it as a left node or a right node. Finally the PrintTree class is used to print the tree.

## How does the binary search algorithm work?

Binary search is an efficient algorithm for finding an item from a sorted list of items. It works by **repeatedly dividing in half the portion of the list that could contain the item, until you’ve narrowed down the possible locations to just one**.

## How do you do a heap sort?

**Heap Sort Algorithm for sorting in increasing order:**

- Build a max heap from the input data.
- At this point, the largest item is stored at the root of the heap. Replace it with the last item of the heap followed by reducing the size of heap by 1. …
- Repeat step 2 while the size of the heap is greater than 1.

## How do you create a node in data structure?

**Algorithm**

- Create a class Node which has two attributes: data and next. Next is a pointer to the next node.
- Create another class which has two attributes: head and tail.
- addNode() will add a new node to the list: Create a new node. …
- display() will display the nodes present in the list:

## How do you make a class static in Python?

**Use the @classmethod Decorator to Create a Static Class in Python**. The @classmethod can make a method static to the class and not its object. It has several advantages over the @staticmethod decorator. It will also work with subclasses and can modify the class state.

## How do you make a class static in C++?

**There is no such thing as a static class in C++**. The closest approximation is a class that only contains static data members and static methods. Static data members in a class are shared by all the class objects as there is only one copy of them in the memory, regardless of the number of objects of the class.

## What is Linkedlist Java?

In Java, the linked list class is **an ordered collection that contains many objects of the same type**. Data in a Linked List is stored in a sequence of containers. The list holds a reference to the first container and each container has a link to the next one in the sequence.

## What is Java tree?

A Tree is **a non-linear data structure where data objects are organized in terms of hierarchical relationship**. The structure is non-linear in the sense that, unlike simple array and linked list implementation, data in a tree is not organized linearly. Each data element is stored in a structure called a node.

## How do I create a new node?

**make the last node => next as the new node.**

- Declare head pointer and make it as NULL. struct node { int data; struct node *next; }; struct node *head = NULL;
- Create a new node. …
- If the head node is NULL, make the new node as head. …
- Otherwise, find the last node and set last node => new node.

## How do you create a node in Python?

Creation of Nodes

The nodes are created **by implementing a class which will hold the pointers along with the data element**. In the below example we create a class named daynames to hold the name of the weekdays. The nextval pointer is initialized to null and three nodes and initialized with values as shown.

## What is a node in Python?

A Node is **a data structure that stores a value that can be of any data type and has a pointer to another node**. The implementation of a Node class in a programming language such as Python, should have methods to get the value that is stored in the Node, to get the next node, and to set a link to the next node.

## What is self in Python?

The self parameter is **a reference to the current instance of the class, and is used to access variables that belongs to the class**.

## How do you do a linear search in Python?

Concept of Linear Search

Step – 1: **Start the search from the first element and Check key = 7 with each element of list x.** Step – 2: If element is found, return the index position of the key. Step – 3: If element is not found, return element is not present.