CompTIA DataSys+ DS0-001 Practice Test 2026 | Real Exam Questions

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A table contains repeating groups of phone numbers stored as a comma-separated list in a single column. To achieve First Normal Form (1NF), which change is required?

Split the phone numbers into a separate table with one row per number Add a primary key constraint on the existing column Create a foreign key pointing to itself Add a CHECK constraint that validates the format

Correct Answer:

Split the phone numbers into a separate table with one row per number

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