DA0-002 Data Analysis Practice Question
A data team is preparing data for a clustering analysis. Which THREE of the following steps are commonly part of data cleaning?
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
✓
Removing duplicate records
Data cleaning includes handling missing values, outlier treatment, and deduplication.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Removing duplicate records
Why this is correct
Deduplication is cleaning.
- ✓
Imputing missing values
Why this is correct
Part of data cleaning.
- ✗
Calculating the mean
Why it's wrong here
Descriptive statistic, not cleaning.
- ✗
Training a regression model
Why it's wrong here
Modeling, not cleaning.
- ✓
Capping outliers at the 5th and 95th percentiles
Why this is correct
Outlier treatment is cleaning.
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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.