DEA-C01 Data Ingestion and Transformation Practice Question
A data engineer needs to transform data in Amazon S3 using AWS Glue. The job must handle schema evolution and partition pruning. Which THREE features should be used?
⚠ Common exam trap
The DEA-C01 exam often tests the distinction between 'incremental processing' (job bookmarks) and 'schema evolution' (Data Catalog + crawlers), leading candidates to incorrectly select job bookmarks for schema changes.
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
✓
AWS Glue Data Catalog
AWS Glue Data Catalog (A) is correct because it acts as a central metadata repository that stores table definitions and schema information. When schema evolution occurs (e.g., new columns are added in Parquet or JSON data), the Data Catalog can be updated via crawlers or manual schema registration, allowing Glue ETL jobs to dynamically adapt to changing schemas without hardcoding column structures.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
AWS Glue Data Catalog
Why this is correct
The Data Catalog stores schema and partition metadata.
- ✗
AWS Glue job bookmarks
Why it's wrong here
Bookmarks track job state for incremental processing.
- ✗
AWS Glue FindMatches transform
Why it's wrong here
FindMatches is for record linkage.
- ✓
AWS Glue crawlers
Why this is correct
Crawlers discover schema and update the Data Catalog.
- ✓
Partition indexes
Why this is correct
Partition indexes improve query performance by pruning.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
Go deeper
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DEA-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 DEA-C01 exam.