DEA-C01 Data Operations and Support Practice Question
A data engineer needs to set up a data catalog for a new data lake in AWS Glue. The data resides in S3 in Parquet format. The engineer wants to ensure that the schema is automatically detected and updated when new columns are added to the data. Which configuration should the engineer use?
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
✓
Configure the crawler's 'Schema updates' option to 'Update the table schema'.
Configuring the crawler's 'Schema updates' option to 'Update the table schema' allows Glue crawlers to automatically detect and update the schema when new columns are added to the data. Option A is wrong because a partition index is used to improve query performance on partitioned data, not to update the schema. Option C is wrong because setting the crawler's database output to a new database does not affect schema updates; it simply directs the crawler to write to a different database. Option D is wrong because partition indexing (enable partition indexing) is about indexing partitions for faster querying, not about schema updates.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Add a partition index to the Glue Data Catalog table.
Why it's wrong here
Partition indexes do not update schema.
- ✓
Configure the crawler's 'Schema updates' option to 'Update the table schema'.
Why this is correct
This enables automatic schema detection and updates.
- ✗
Set the crawler's 'Database' output to a new database.
Why it's wrong here
This does not affect schema updates.
- ✗
Enable partition indexing on the table.
Why it's wrong here
Partition indexing improves query performance, not schema updates.
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.