DA0-002 Data Analysis Practice Question
A data analyst is evaluating the quality of a customer database. Which THREE of the following are dimensions of data quality?
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
Accuracy, completeness, and timeliness are standard data quality dimensions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Completeness
Why this is correct
Completeness measures whether required customer attributes are populated, directly assessing missing values in the database. It is a recognised data quality dimension because gaps in mandatory fields undermine segmentation, contactability and downstream analytics, satisfying the evaluation's need to quantify absent data.
- ✗
Correlation
Why it's wrong here
Correlation measures the statistical relationship between two variables, not a property of data itself. It is tempting because analysts routinely compute it during profiling, and it would be the correct measure when assessing whether two fields, such as age and spend, move together.
- ✓
Timeliness
Why this is correct
Timeliness assesses whether customer data reflects the current state when needed, addressing staleness in the database. It is a core quality dimension because outdated records misdirect campaigns and decisions, satisfying the evaluation's requirement to judge currency against usage requirements.
- ✓
Accuracy
Why this is correct
Accuracy measures whether stored customer values correctly represent real-world entities, addressing errors such as wrong addresses or misspelt names. It is a fundamental quality dimension because incorrect values corrupt analysis and communications, satisfying the evaluation's need to verify correspondence with reality.
- ✗
Variance
Why it's wrong here
Variance quantifies the spread of a distribution, describing statistical dispersion rather than the fitness of stored values. It is tempting because it appears in profiling summaries, and it would be the correct measure when assessing how widely a numeric attribute such as customer spend varies.
Go deeper
Related to this question
About these practice questions
Courseiva writes every DA0-002 question from scratch — 1,004 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or 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.