What is a mashup in web applications?

• A. A Web App That Runs Offline
• B. A Web App That Uses Machine Learning
• C. A Web App That Only Uses A Single Data Source
• D. A Web App That Combines Data Or Functionality From Multiple Sources Into One UI

Answer: (D)

A mashup is about bringing together data or functionality from multiple sources into one unified user interface. In web applications, this means the app pulls in services or datasets from different providers—often via APIs or embedded widgets—and presents them as a single, cohesive experience. For example, a travel planner might show flight options from one data source, hotel availability from another, and local weather from a third, all within one page. The strength of a mashup is this seamless fusion of diverse content into one UI, rather than relying on a single data source or a specific technology like offline capability or machine learning.

So it’s not about running offline, nor specifically about machine learning, nor about using just one data source. It’s about integrating multiple sources so the user sees a combined, interactive interface.