Question 574 of 835
MLA-C01 Data Preparation for Machine Learning Practice Question
A data scientist is using SageMaker Data Wrangler to prepare a large dataset. The data contains duplicate rows, which could bias the model. Which built-in step in Data Wrangler can automatically detect and remove duplicates?
⚠ Common exam trap
Many candidates confuse AWS Glue Studio transforms (like FindDuplicates) with SageMaker Data Wrangler's built-in steps, as both are AWS data preparation services but operate in different environments and have distinct feature sets.
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
✓
Handle Duplicates transform in Data Wrangler
The Handle Duplicates transform is a built-in step in SageMaker Data Wrangler specifically designed to detect and remove duplicate rows from a dataset. It provides configurable options such as selecting a subset of columns for duplicate detection and choosing whether to keep the first or last occurrence, directly addressing the bias risk from duplicate rows in ML training data.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Amazon QuickSight duplicate detection
Why it's wrong here
QuickSight is a BI tool, not for data preparation.
- ✓
Handle Duplicates transform in Data Wrangler
Why this is correct
Data Wrangler provides a built-in transform to drop duplicate rows.
- ✗
AWS Glue Studio FindDuplicates transform
Why it's wrong here
Glue Studio has custom transforms, but not a standard FindDuplicates; Data Wrangler is more direct.
- ✗
Amazon DataZone catalog
Why it's wrong here
DataZone manages data assets, not data cleaning.
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Last reviewed: Jun 24, 2026
This MLA-C01 practice question is part of Courseiva's free Amazon Web Services 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 MLA-C01 exam.
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