DA0-002 Data Acquisition and Preparation Practice Question
A data quality assessment reveals that a column named 'email' contains values like 'user@example' (missing domain extension). Which data profiling technique would best identify such pattern violations?
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
✓
Pattern analysis
Pattern analysis involves checking values against expected patterns (e.g., regex for email format). Cardinality counts distinct values, referential integrity checks relationships between tables, and data type verification checks data types.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Pattern analysis
Why this is correct
Identifies values that do not conform to expected formats.
- ✗
Cardinality analysis
Why it's wrong here
Counts distinct values, not pattern violations.
- ✗
Referential integrity check
Why it's wrong here
Checks foreign key relationships, not column patterns.
- ✗
Data type verification
Why it's wrong here
Confirms data type, not specific value patterns.
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JA
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.