The document provides an overview of the MEAN stack, which is a collection of JavaScript technologies used to develop web applications. It consists of MongoDB (a no-SQL database), ExpressJS (a web application framework), AngularJS (a front-end JavaScript framework), and NodeJS (a runtime environment for JavaScript). Each technology is described briefly, outlining its purpose and benefits like performance, scalability, and the use of a single programming language throughout the application stack.

1. What is MEAN
?
A Collection of
JavaScript based
technologies
to Develop
Web Applications

2. Why MEAN stack
!
1. Single language is used
throughout the application
2. Support and often enforce the
use of the MVC architecture
3. Performance
4. Popularity of JavaScript
5. Open Source Project

3. What is NodeJS
?
A Run Time Environment for Java
Script

4. How NodeJS
It Compiles the javascript code to
Native machine code before
execution
Event based mechanism

5. Why NodeJS
Scalable and Fast Web
Application
Light weight
Perfect for real time
applications

6. Features of
NodeJS
Asynchronous and Event driven
Single threaded
No buffering
Open Source
Npm
Node modules

7. What is
AngularJS MVC based JavaScript Framework

8. What AngularJS
can do?
Develop complex client side
application
Single Page Applications

9. Why this
AngularJS
Less load on the server
Structure the Code and
development practice and in
MVC/MVVM
Reusable components
Easily Testable components

10. How AngularJS
Components
Dependency Injection
Data binding
Directives
Filters
Services
Routes
Dirty checking

11. What is
MongoDB
no SQL Database
It uses JSON style documents for
the data representation

12. Why MongoDB
JSON everywhere
Lightweight
Less disk space
Scalable architecture
No more SQL statements

13. How MongoDB
Support ad hoc queries
Indexing
Replication
Load Balancing
Map reduction and Aggregation
tools
JavaScript instead of Procedures
High performance

14. Replication

15. What is
ExpressJS
Server side web and mobile
application framework

16. Features of
ExpressJS
Allows and responds to HTTP
requests
Defines routes
Dynamic rendering of HTML pages
Helper functions for Web
Applications
Templating Engines
REST support

17. What is Vue.Js A progressive framework for
building user interfaces

18. Features of
VueJS
Declarative rendering
Vue focuses on “view layer”
Reactivity
Data Binding
Directives
Components
Encapsulation
Event Handling
Computed properties
Transition effects
Typescript support