CompTIA Data+ (DA0-001) — Question 145

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

Answer options

• A. Placing old data in new fields
• B. Keeping only the most recent data
• C. Creating a codebook to document field changes
• D. Removing the data source from production

Correct answer: C

Explanation

Creating a codebook to document field changes is vital as it ensures transparency and helps future users understand the modifications made to the data source. Options A and B fail to address the need for documentation, while option D removes the data source entirely, which is not a practical solution when updates are necessary.