DA0-002 Data Concepts and Environments Practice Question
A data analyst is working with a dataset that contains customer names and addresses. Some records have missing state codes. Which data quality issue is this?
⚠ Common exam trap
A common mix-up: candidates confuse incompleteness with inconsistency, but incompleteness is about missing data (nulls), while inconsistency is about contradictory data across records.
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
✓
Incompleteness
Incompleteness is the correct answer because missing state codes in customer address records represent a lack of required data. This is a classic example of incomplete data, where fields that should contain values are left null or blank, reducing the dataset's usability for analysis.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Duplication
Why it's wrong here
Duplication is about repeated records, not missing data.
- ✓
Incompleteness
Why this is correct
Missing state codes make the record incomplete.
- ✗
Outliers
Why it's wrong here
Outliers are extreme values, not missing data.
- ✗
Inconsistency
Why it's wrong here
Inconsistency refers to contradictory data, not missing values.
Go deeper
Related to this question
About these practice questions
This DA0-002 question is part of Courseiva's 986-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
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.