DBS-C01 Workload-Specific Database Design Practice Question
A company is designing a database for a global e-commerce platform. The application requires single-digit millisecond read and write latency for user sessions, and must handle millions of requests per second. The data is key-value in nature. Which TWO AWS services should the company consider? (Choose two.)
⚠ Common exam trap
Candidates often choose Amazon RDS for MySQL or Amazon Neptune because they are familiar with SQL or graph databases, but they fail to recognize that key-value workloads with extreme throughput and latency requirements are a core use case for DynamoDB and ElastiCache, not relational or graph databases.
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 is designed for high-traffic applications requiring millions of requests per second, making it ideal for the global e-commerce platform's user session data.
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 DynamoDB
Why this is correct
Key-value NoSQL database with single-digit millisecond latency.
- ✓
Amazon ElastiCache for Redis
Why this is correct
In-memory key-value store with sub-millisecond latency.
- ✗
Amazon Neptune
Why it's wrong here
Graph database, not for simple key-value.
- ✗
Amazon Redshift
Why it's wrong here
Data warehouse, not for transactional key-value.
- ✗
Amazon RDS for MySQL
Why it's wrong here
Relational database, not suited for ultra-low latency at scale.
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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.