Data Warehousing Quiz

What is a data warehouse primarily used for?

• Managing customer relationships

• Performing real-time transactions

• Supporting management's decision-making process

• Storing operational data

Who coined the term 'Data Warehouse'?

• Ralph Kimball

• Bill Inmon

• Howard Dresner

• Peter Chen

Which of the following is NOT a characteristic of a data warehouse?

• Volatile

• Subject-oriented

• Integrated

• Time-variant

What is the purpose of metadata in a data warehouse?

• To store user data

• To perform data mining

• To provide data about data

• To enhance data security

Which approach to building a data warehouse involves creating a centralized repository first?

• Incremental Approach

• Hybrid Approach

• Bottom-Up Approach

• Top-Down Approach

What is a data mart?

• A tool for data extraction

• A type of data warehouse for the entire organization

• A subset of a data warehouse focused on a specific subject

• A database for operational data

Which of the following best describes operational data?

• Historical and static

• Summarized and non-updateable

• Aggregated and time-variant

• Detailed and updateable

What is the main advantage of using a star schema in data warehousing?

• Simplified queries with fewer joins

• Easier data extraction processes

• High normalization for data integrity

• Complex structure for detailed analysis

In the context of data warehousing, what does 'drill-down' refer to?

• Accessing data from multiple sources

• Navigating from summarized data to detailed data

• Aggregating data for summary reports

• Traversing from detailed data to summarized data

What is the primary function of data extraction, cleanup, and transformation tools?

• To visualize data for end-users

• To prepare data for loading into the warehouse

• To perform data analysis

• To manage user access to data