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Java is a high-level object-oriented programming language. it's firstly released by Sun Microsystems in 1995. Use this tag when you're having queries using or understanding the language. This tag is also applicable to Java libraries and frameworks.

JavaScript is a scripting or programming language that allows you to implement complex features on web pages. It is the third layer of standard web technologies ( others two are html and css). Note:- JavaScript is NOT Java.

Common datatype in many programming languages for representing both negative and non-negative whole numbers.

This tag is used for random number and their generators.

String is a data type used in most of the programming language. String is a sequence of characters and can contain letters, spaces , symbols ,numbers etc. commonly used for text, though sometimes for arbitrary data.

C is a procedural and general-purpose programming language. Mostly used for system programming , gaming ,libraries etc . This tag can be used for queries related to C language. Note :- C is not C++ both are different programming language

RabbitMQ is an open-source messaging broker. It is lightweight and easy to deploy in the cloud and on premises. It supports multiple streaming and messaging protocols. It's supported via a plug-in architecture. It can be deployed in distributed and federated configurations to meet high-scale, high-availability requirements.

SQL stands for Structured query language. It is a programming language for storing and processing information in a relational database. It is standard language for accessing and manipulating databases.

A database is an organized collection of data. It is the collection of schemas, tables, queries, reports, views, and other objects. The data are typically organized to model aspects of reality in a way that supports processes requiring information. Use this tag if you have questions about designing a database.

DBMS stands for database management system . It is a software system that is designed to organize and manage data with the help of this user can create, modify and query a database. as well as manage the security and access controls for that database.

Oracle Database is a proprietary multi-model database management system produced and marketed by Oracle Corporation

MySQL is an open-source relational database management system

PostgreSQL is a free, open source relational database management system. It was initially developed as a successor of the Ingres database

AWS stands for Amazon Web Service.

Amazon EC2 stands for Amazon Elastic Compute Cloud.

An array is a systematic arrangement of similar objects, usually in rows and columns.

A linked list is a linear data structure where elements, called nodes, are connected using pointers. Each node contains data and a reference to the next node, allowing dynamic memory allocation and efficient insertion or deletion. Common types include singly, doubly and circular linked lists, widely used in data manipulation and memory management.

A stack is a linear data structure that follows the Last In, First Out (LIFO) principle. Elements are added (push) and removed (pop) from the top, making it ideal for tasks like expression evaluation, backtracking and function call management. Common implementations include arrays and linked lists for efficient data handling.

A queue is a linear data structure that follows the First In, First Out (FIFO) principle. Elements are added at the rear (enqueue) and removed from the front (dequeue), making it ideal for scheduling, task management and buffering. Common types include simple queue, circular queue, priority queue and deque.

A tree is a hierarchical data structure consisting of nodes connected by edges, with a single root node and child nodes forming subtrees. It is widely used for representing hierarchical relationships, enabling fast search, insertion and deletion. Common types include binary trees, AVL trees and B-trees in data organization and algorithms.

A graph is a non-linear data structure made up of vertices (nodes) and edges (connections) that represent relationships between entities. Graphs can be directed or undirected, weighted or unweighted. They are widely used in networking, social media analysis, shortest path algorithms and modeling complex real-world relationships efficiently.

Algorithms means a set of rules that we follow to solve a problem

Character is a Data Structure.

HashTable is a Data Structure.

Binary Search Tree is a Data Structure.

Binary Tree is a Data Structure.

AVL Tree is a Data Structure.

Ternary Tree is a Data Structure.

N-ary Tree (Generic Tree) is a Data Structure.

A red-black tree is a kind of self-balancing binary search tree where each node has an extra bit.

B-Tree is a self-balancing search tree.

B+ Tree is one next level of opt on B Tree

Segment Tree is a tree data structure used for storing information about intervals or segments.

Singly Linked List is a Data Structure.

Doubly Linked List is a Data Structure.

Circular Linked List is a Data Structure.

Circular Doubly Linked List is a Data Structure.

Header Linked List is a Data Structure.

A set is a collection data structure that stores unique elements without duplicates. It is commonly used for tasks like membership testing, removing duplicates and mathematical operations such as union, intersection and difference. Implementations include HashSet, TreeSet and SortedSet in various programming languages for efficient data handling.