1. What is the primary function of a data warehouse in Business Intelligence (BI)? A) Data cleansing B) Data storage and management C) Data presentation D) Data mining Answer: B) Data storage and management Rationale: A data warehouse serves as a central repository of integrated data from one or more disparate sources. It stores current and historical data and is used for creating analytical reports for knowledge workers throughout the enterprise. 2. Which BI tool is best suited for real-time data analysis? A) OLAP B) ETL C) Data mining D) CEP Answer: D) CEP (Complex Event Processing) Rationale: CEP tools are designed to manage data in real-time, analyzing and processing information as events occur, which is essential for realtime data analysis. 3. In the context of BI, what does 'ETL' stand for? A) Extract, Transform, Load B) Execute, Translate, Load C) Extract, Translate, Leverage D) Execute, Transform, Leverage Answer: A) Extract, Transform, Load Rationale: ETL is a process that extracts data from various sources, transforms the data for storing in the proper format or structure for the purposes of querying and analysis, and loads it into the final target database. 4. What is the role of OLAP in Business Intelligence? A) Data entry B) Data mining C) Data analysis D) Data visualization