DBS-C01 Workload-Specific Database Design Practice Question
A company needs to store JSON documents that are frequently accessed by a web application. The documents have varying attributes and the query pattern includes filtering on multiple fields. Which AWS database service is most suitable?
⚠ Common exam trap
Watch out — candidates often choose Amazon RDS for MySQL because they assume JSON support in relational databases is sufficient, but they overlook the performance and schema flexibility limitations when dealing with varying attributes and multi-field filtering at scale.
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 DynamoDB
Amazon DynamoDB is the most suitable choice because it is a fully managed NoSQL key-value and document database that natively supports JSON documents with varying attributes. Its flexible schema allows each item to have different attributes, and its support for secondary indexes (Local Secondary Indexes and Global Secondary Indexes) enables efficient filtering and querying on multiple fields without requiring predefined schemas or complex joins.
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 Neptune
Why it's wrong here
Graph database, not optimized for JSON document queries.
- ✗
Amazon ElastiCache for Redis
Why it's wrong here
Designed as cache, not durable primary store.
- ✓
Amazon DynamoDB
Why this is correct
NoSQL, supports JSON and flexible queries with GSIs.
- ✗
Amazon RDS for MySQL
Why it's wrong here
Relational schema is rigid for varying JSON attributes.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.