DA0-002 Data Acquisition and Preparation Practice Question
A data analyst is performing data profiling on a customer table. Which TWO metrics are most useful for understanding the completeness of the data? (Choose two.)
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
✓
Null count per column
Row count gives total records, null count gives missing values per column, both help assess completeness. Cardinality is for uniqueness, min/max for range, mean for central tendency.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Minimum and maximum values
Why it's wrong here
Indicates range, not completeness.
- ✓
Null count per column
Why this is correct
Directly measures missing values.
- ✓
Row count
Why this is correct
Indicates total number of records.
- ✗
Cardinality
Why it's wrong here
Measures distinct values, not completeness.
- ✗
Mean value
Why it's wrong here
Central tendency, not completeness.
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.