CompTIA Data+ DA0-002 (V2) Practice Question

A data analyst at an e-commerce company discovers that the marketing team's customer report shows 150,000 active customers, while the sales team's CRM reports 145,000. This discrepancy is causing confusion in strategic planning. To resolve this and ensure consistent reporting across the organization, which of the following data management concepts is MOST critical to establish?

Continuous data integration
Data lineage documentation
A comprehensive data dictionary
A single source of truth (SSOT)

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Answer Description

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.

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