Review paper on CRUD Operations:Using Arrays , mongoDB for data storage.

Abstract

This project presents a simple implementation of a CRUD (Create, Read, Update, Delete) web application using only arrays for data storage instead of a traditional database. Built with Node.js and Express, the app demonstrates core concepts of data manipulation and RESTful routing. It provides a lightweight framework suitable for educational purposes and early-stage prototyping where database integration is unnecessary. The system handles user- generated posts and operates fully in- memory, ensuring high-speed operations without persistent storage. This paper also introduces a web-based chat application that incorporates full CRUD functionality supported by MongoDB. The project leverages Express.js for backend operations, with routes designed for creating, reading, updating, and deleting chat messages. By using MongoDB as the persistent data layer, it demonstrates integration of NoSQL databases in modern web development. The application serves as a foundational model for scalable, real-time communication systems and emphasizes efficient data handling through Mongoose- based schemas.