Question 339 of 1,663
DBS-C01 Workload-Specific Database Design Practice Question
A company needs to store JSON documents that require complex querying on nested attributes. The database must support ACID transactions and be fully managed. Which service should they use?
⚠ Common exam trap
Test-takers frequently choose Amazon DocumentDB assuming it supports full ACID transactions because of its MongoDB compatibility, but MongoDB (and DocumentDB) only guarantees atomicity for single-document operations, not multi-document ACID transactions, which Aurora MySQL provides via its relational engine.
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
✓
Amazon Aurora MySQL
Amazon Aurora MySQL is correct because it supports JSON documents with complex querying on nested attributes via MySQL's JSON data type and JSON path expressions, while also providing full ACID transaction support through its MySQL-compatible engine. As a fully managed service, Aurora handles provisioning, backups, and patching, meeting all stated requirements.
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 Aurora MySQL
Why this is correct
Supports JSON and ACID transactions.
- ✗
Amazon DocumentDB (with MongoDB compatibility)
Why it's wrong here
Not fully ACID compliant.
- ✗
Amazon DynamoDB
Why it's wrong here
Limited querying on nested attributes.
- ✗
Amazon Neptune
Why it's wrong here
For graph data, not JSON documents.
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Last reviewed: Jul 4, 2026
This DBS-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 DBS-C01 exam.
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