DEA-C01 Data Ingestion and Transformation Practice Question
Network Topology
Refer to the exhibit. A data engineer is troubleshooting a Glue job that reads objects from this S3 bucket. The job runs successfully but produces no output. The Glue catalog table points to the same S3 path. What is the most likely cause?
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
✓
The S3 key does not follow Hive-style partitioning (e.g., year=2024/month=01).
AWS Glue Data Catalog relies on Hive-style partitioning (e.g., year=2024/month=01) to automatically discover and register partitions. The S3 key in the exhibit does not follow this pattern, so Glue cannot identify the partitions, resulting in no data being read even though the job runs. Option B is incorrect because object metadata size does not affect Glue's ability to read data. Option C is incorrect because the STANDARD storage class is fully supported by Glue. Option D is incorrect because ContentType is not a factor in Glue catalog table definitions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The S3 key does not follow Hive-style partitioning (e.g., year=2024/month=01).
Why this is correct
AWS Glue Data Catalog relies on Hive-style partitioning (e.g., year=2024/month=01) to automatically discover and register partitions. Partition projection is a separate Athena feature, not a Glue feature.
- ✗
The object metadata is too large.
Why it's wrong here
Object metadata size does not affect Glue's ability to read data.
- ✗
The StorageClass is not supported by Glue.
Why it's wrong here
The STANDARD storage class is fully supported by Glue.
- ✗
The ContentType is not supported by Glue.
Why it's wrong here
ContentType is not a factor in Glue catalog table definitions.
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 |
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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.