DBS-C01 Workload-Specific Database Design Practice Question
A startup is building a mobile app that requires a scalable NoSQL database. The data model includes user profiles with variable attributes that change over time. The database must support high read throughput and low latency. Which AWS database is best suited?
⚠ Common exam trap
It's easy for candidates to confuse Amazon Neptune's graph capabilities with NoSQL flexibility, or assume a relational database like MySQL can handle variable attributes via JSON columns, overlooking DynamoDB's native schema-less design and guaranteed single-digit millisecond performance 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 a fully managed NoSQL key-value and document database that delivers single-digit millisecond latency at any scale. It supports flexible schema with variable attributes, making it ideal for user profiles that change over time, and its provisioned or on-demand capacity modes enable high read throughput with consistent low latency.
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 for connected data, not general-purpose NoSQL.
- ✗
Amazon RDS for MySQL
Why it's wrong here
Relational database, not ideal for variable attributes and high scalability.
- ✓
Amazon DynamoDB
Why this is correct
NoSQL, flexible schema, high performance at scale.
- ✗
Amazon Redshift
Why it's wrong here
Data warehouse, not suitable for transactional mobile app.
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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.