DA0-002 Data Analysis Practice Question
Which data quality dimension is violated if a customer record has a missing phone number?
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
✓
Completeness
Completeness refers to the extent to which data is not missing.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Consistency
Why it's wrong here
Consistency concerns whether the same attribute agrees across records or systems, such as two conflicting phone numbers. A missing value breaches completeness, since the field is unpopulated. Consistency is tempting because both describe data defects, but absence is not disagreement between sources.
- ✗
Accuracy
Why it's wrong here
Accuracy concerns whether a present value correctly reflects reality, such as a wrong phone number. A missing phone number breaches completeness, because the attribute is absent rather than incorrect. Accuracy is tempting since both are quality defects, but no value exists to be inaccurate.
- ✓
Completeness
Why this is correct
Completeness measures whether all required values are present in a record. A missing phone number means the attribute holds no value, directly violating this dimension. Other dimensions, such as accuracy or consistency, assume a value exists but is wrong or conflicting; here nothing is recorded at all.
- ✗
Validity
Why it's wrong here
Validity concerns whether a value conforms to its defined format, type or domain, such as a phone number matching a pattern. A missing value breaches completeness, since data is absent. Validity is tempting because malformed phone numbers are validity failures, but absence is the completeness dimension.
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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.