A data set is best described as which of the following?

• A. A subset of a database created for a specific analytic purpose
• B. A complete Data Warehouse
• C. A Raw Transactional Feed
• D. A Data Lake

Answer: (A)

The main idea here is that a data set is a focused slice of data prepared for a specific analytic task. It is typically extracted from a larger database and tailored for analysis, meaning only the relevant rows and features are included, often after cleaning or transforming them. This makes it a subset created for a particular purpose, which is exactly what a data set represents in practice.

In contrast, a complete Data Warehouse is a broad, enterprise-wide repository designed for reporting and governance, not a single analytic slice. A Raw Transactional Feed refers to the live stream of unprocessed transactions, not a prepared subset. A Data Lake stores data in its raw, diverse formats, without being limited to a specific analytic subset.