The main features of Rapid Application development are to provide a library of functions for GUI development, to provide drag and drop features in an IDE, Auto-generation of code for the user interface from a declarative specification.

Report generators are the tools to generate human readable reports from a database. They integrate querying the database with the creation of formatted text and summary charts.

Creating mass servers for effective handling of data is not a part of the web application development framework feature.

JSON – JavaScript Object Notation. This is an encoding for javascript objects.

In the model-view-controller architecture, the model corresponds to the business logic layer, the view defines the way data is presented and the controller receives events, executes actions on the model and returns a view.

Business logic includes workflows. Workflows in a business logic layer describe how a particular task involving multiple participants is handled.

The Business-logic layer provides a high level view of data and actions on data. An object oriented approach is used to code this layer.

The data-access layer provides the interface between the business logic layer and the underlying database. The data access layer provides the mapping from the object oriented data model to the relational model.

The code implementing the actions in the business logic layer ensures that business rules are followed. For example a student can only enroll in a course if the prerequisites are completed.

To reduce overhead, any of the following methods can be used. Connection pooling, Parallel processing or caching query results at the server. Caching query results at the server enables to reduce the number of database accesses every time a similar request is sent.