Which artifact should a data analyst consult to understand table names, field definitions, data types, and field definitions?

• A. Data dictionary
• B. Data explainability report
• C. Data lineage
• D. Data flow diagram

Answer: (A)

Understanding the structure and meaning of data elements is essential for accurate analysis. The data dictionary serves as a centralized catalog of metadata about data elements, including table names, column names, definitions, data types, allowed values, constraints, and relationships to other elements. This makes it the go-to reference for knowing what each field represents, how it should be stored, and how it can be used in queries and joins. With the data dictionary, you can interpret data consistently across reports and analyses, ensuring you apply the correct type and constraints for each field.

Other artifacts focus on different aspects: data lineage shows where data originates and how it moves and transforms through systems; data flow diagrams illustrate the flow of data through processes; data explainability reports describe model features and outputs. While valuable, these do not principally document the schema and metadata needed to understand table structures and field definitions.