DA0-002 Data Analysis Practice Question
A data analyst is evaluating data quality for a customer database. Which TWO dimensions of data quality are most directly affected by duplicate customer 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
✓
Accuracy
Duplicates reduce accuracy (records may be incorrect) and uniqueness (each entity should appear once).
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 relates to format or logical rules across records.
- ✓
Accuracy
Why this is correct
Duplicates can cause inaccurate counts and misrepresent entity.
- ✗
Timeliness
Why it's wrong here
Timeliness refers to data being up-to-date.
- ✗
Completeness
Why it's wrong here
Completeness refers to missing data, not duplicates.
- ✓
Uniqueness
Why this is correct
Duplicates violate uniqueness; each entity should have one record.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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