Which statement best defines data mining?

• A. Employs different technologies to search "nuggets" of information from data stored in a data warehouse
• B. A class of database applications that look for hidden patterns in a group of data that can be used to predict future behavior
• C. A method for data backup and archiving
• D. A technique for data encryption and security

Answer: (B)

Data mining is about discovering hidden patterns, relationships, and trends in large datasets and using what you find to inform predictions and decisions. The statement that describes it as a class of database applications that search for hidden patterns in data to predict future behavior best captures this idea, because the core goal is to reveal patterns and leverage them to forecast what might happen next. In practice, data mining often sits on top of data warehouses and uses techniques from statistics, machine learning, and pattern recognition to turn raw data into actionable insights. The other options miss the predictive quality or focus on activities like preserving, securing, or simply retrieving data, which are not what data mining is about.