Interfaces, like classes, define a set of properties, methods, and events. But unlike classes, interfaces do not provide implementation. They are implemented by classes, and defined as separate entities from classes.

QTP has some additional functionality which is not present in WinRunner. For example,you can test(Functionality and Regression testing) an application developed in .Net technology with QTP,which is not possible to test in WinRunner

An application made up of distinct components running in separate runtime environments, usually on different platforms

connected via a network. Typical distributed applications are two-tier (client-server), three-tier

(client-middleware-server), and multitier (client-multiple middleware-multiple servers).

Bipolar coding scheme originally developed for use in Ethernet. Clocking information is embedded into and recovered from the synchronous data stream without the need for separate clocking leads. The biphase signal contains no direct current energy.

Web forms are very similar to traditional HTML forms. The difference is that Web forms are server-based, meaning you create the user elements on the server. The server has complete knowledge of what the interface looks like, what it can do what data it expects, and so on. Web forms pages are divided into two parts: the visual elements and the accompanying UI logic. These two components are completely separate from each other conceptually, and they can be physically located anywhere you want. Typically, both parts are contained within one .aspx file. The System.Web.UI namescape defines classes and interfaces used in constructing nd rendering elements on a Web form. The most important class in the System.Web.UI is the Control class which defines the properties, methods and events that are common in all server controls in the WebForm framework. Another important class in this namespace is Page which is a derivative of the Control Class. All ASP.NET web pages are instances of derivatives of the Page Class. To have an extensible framework, the System.Web.UI namespace also includes the UserControl class which is similar to Page class except that it is mainly used as the base class for user controls.