Which of the following is the Web 2.0 programming methodology that is used to create Web pages that are dynamic and interactive?

UML (Unified Modeling Language) is a standardized diagramming language used for software design and documentation, not a web programming methodology for building interactive pages.

Ajax allows web pages to send and receive data from a server asynchronously in the background using the XMLHttpRequest object or the Fetch API, enabling partial page updates and highly interactive user experiences. This technique is the defining characteristic of Web 2.0 applications, allowing dynamic content refresh without full page reloads. Applications like Gmail and Google Maps popularized Ajax as the standard approach for building responsive, interactive web interfaces.

RSS (Really Simple Syndication) is a web feed format for distributing frequently updated content like news or blog posts, not a programming methodology for creating dynamic web pages.

XML (Extensible Markup Language) is a markup language for structuring data and is used as a transport format within Ajax, but is itself not a programming methodology for creating dynamic or interactive web pages.