DA0-002 Data Acquisition and Preparation Practice Question
A data analyst is performing data profiling on a customer dataset. Which metric would best reveal the number of distinct values in the 'state' column?
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
✓
Cardinality
Cardinality refers to the number of unique values in a column, which directly indicates distinct states.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Mean
Why it's wrong here
Mean is an average, not applicable to categorical data.
- ✗
Row count
Why it's wrong here
Row count gives total rows, not distinct values.
- ✓
Cardinality
Why this is correct
Cardinality is the count of distinct values.
- ✗
Null count
Why it's wrong here
Null count shows missing values, not distinctness.
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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.