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Node.js                       - Developed by Ryan Dahl in 2009                                     -Open source server environment.                    -Runs on different platforms such as Windows, Linux, Unix and                                                 Mac OS                    -G enerate dynamic pages                   -A dd, delete, update and edit data in database                   - files use extension ".js" Node.js is best for event based real time applications such as game servers, advertisement servers and streaming servers. With  Node.js  web applications can have a real-time, two-way connections, where both the client and server can initiate communication, allowing them to exchange data freely and also to maintain the session information between requests for a user . Advantages and disadvantages in Node.js Advantages           -Easily extensible.           -Support

     Some points about JavaScript which is useful  from those points about JavaScript you can easily get an idea about that. JavaScript JavaScript is an object oriented programming language. There is no multiple processor in JavaScript. It is a single threaded language. JavaScript is to program the behavior of web pages  JavaScript programs run using a single thread. JavaScript does not wait for I/O operations. JavaScript and Java is completely different It is synchronous JavaScript can have static methods and variables. It supports object oriented programming.  JavaScript accepts both double and single quotes JavaScript classes, objects and prototypes JavaScript introduced a feature to create classes that  prevents accessing the wrong context when using the object properties and methods, which is normally the global scope or the window object. All JavaScript objects are created from the Object constructor.

          Application Framework Principles Frameworks In computer systems, a framework is generally a layered structure implying what kind of programs can or should be built and how they would interrelate. An Application Framework composed of a software framework used by software developers to implement the standard structure of application software. To give you an idea, let us consider the below scenario about the chassis of a car or the steel structure of a building. Application frameworks became famous with the growth of graphical user interfaces (GUIs) since these tended to promote a standard structure for applications. Developers usually use object-oriented programming (OOP) techniques to implement frameworks such that the unique parts of an application can simply inherit from classes extant in the framework.  Choosing a suitable framework among the available frameworks can be a tedious task. No matter which framework you g