DA0-002 Data Acquisition and Preparation Practice Question
A data analyst is validating referential integrity between orders and customers tables. Which TWO of the following checks should the analyst perform?
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
✓
Check that no customer is deleted while having orders
Referential integrity ensures foreign keys match primary keys and no orphaned records.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Check that every order has a non-null order_id
Why it's wrong here
Not related to referential integrity.
- ✓
Check that no customer is deleted while having orders
Why this is correct
Ensures no orphaned records.
- ✓
Check that every customer_id in orders exists in customers
Why this is correct
Ensures foreign key validity.
- ✗
Check that customer names are unique
Why it's wrong here
Not referential integrity.
- ✗
Check that order amounts are positive
Why it's wrong here
Business rule, not referential integrity.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DA0-002 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 DA0-002 exam.