Which of the following is a best practice when updating a legacy data source?

Question

Options

• APlacing old data in new fields
• BKeeping only the most recent data
• CCreating a codebook to document field changes
• DRemoving the data source from production

• A
  3% (1)
• B
  3% (1)
• C
  82% (28)
• D
  12% (4)

Explanation

When updating a legacy data source, it is a best practice to create a codebook to document field changes. A codebook serves as a detailed guide and record of the data structure, definitions, and any transformations or modifications made to the data fields. This documentation is crucial for maintaining data integrity, ensuring consistency, and facilitating future data use and understanding. It provides a reference that can be invaluable for data analysts, developers, and any stakeholders who need to work with the data. Creating a codebook is preferred over placing old data in new fields, which can lead to confusion and data integrity issues. Keeping only the most recent data may result in the loss of valuable historical information. Removing the data source from production is not a practice related to updating data but rather to retiring a data source.

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