CompTIA Data+ DA0-002 (V2) Practice Question

The correct answer is the data dictionary. A data dictionary is a centralized repository of metadata that contains detailed information about data, such as field names, definitions, data types, formats, and business rules. This is precisely what the analyst needs to understand the structure and meaning of the data in the CRM database.

A data flow diagram visualizes how data moves through a system but does not provide detailed definitions of individual data fields.

A data lineage report tracks the origin, movement, and transformation of data over time, rather than providing static definitions of the data elements themselves.

A data explainability report is used to clarify how a machine learning model or complex algorithm arrived at its conclusions; it does not define the source data fields.