DS0-001 Database Planning And Deployment Practice Question
Which database feature is used to automatically maintain data integrity by ensuring that a value in a child table exists as a primary key in a parent table?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Foreign key constraint
A Foreign Key constraint is the standard relational database mechanism for enforcing referential integrity between tables.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Foreign key constraint
Why this is correct
Foreign keys link tables and enforce referential integrity.
- ✗
Check constraint
Why it's wrong here
Check constraints validate data within a single column or row.
- ✗
Unique constraint
Why it's wrong here
Unique constraints ensure no duplicate values, not parent-child relationships.
- ✗
Default constraint
Why it's wrong here
Default constraints provide values for missing fields.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official CompTIA exam blueprint
This DS0-001 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DS0-001 exam.