CompTIA Data+ DA0-002 (V2) Practice Question

The correct answer is establishing a single source of truth (SSOT). An SSOT is the practice of structuring data management so that every data element has a single, authoritative source that the entire organization agrees to use for reporting and decision-making. This directly addresses the problem of different departments having conflicting data.

• Data lineage documentation tracks the origin, movement, and transformations of data. While it would be useful for investigating why the numbers are different, it does not in itself create an authoritative source.
• A comprehensive data dictionary provides definitions, business rules, and metadata for data elements. It would ensure both teams define "active customer" in the same way, but it would not designate which system's count is the official one.
• Continuous data integration is the technical process used to combine data from various sources. While integration is a necessary step to create an SSOT, it is the means to an end, not the governing concept that solves the business problem of inconsistent data.