DBS-C01 Workload-Specific Database Design Practice Question
A company needs to store and query time-series data from IoT devices. The data arrives in high volume and requires efficient range queries over time. Which database is most appropriate?
⚠ Common exam trap
Test-takers frequently choose DynamoDB (Option C) because of its scalability, but they overlook that DynamoDB lacks native time-series optimization and requires complex workarounds for efficient range queries over time, making Timestream the correct purpose-built choice.
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 Timestream
Amazon Timestream is a purpose-built time-series database that automatically scales to handle high-volume IoT data and is optimized for efficient range queries over time. It separates storage into a memory store for recent data and a magnetic store for historical data, enabling fast queries across time ranges with built-in time-series functions.
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 RDS for MySQL
Why it's wrong here
RDS is not optimized for high-volume time-series ingestion and queries.
- ✓
Amazon Timestream
Why this is correct
Timestream is a serverless time-series database designed for IoT and operational applications.
- ✗
Amazon DynamoDB
Why it's wrong here
DynamoDB can store time-series data but lacks built-in time-series functions.
- ✗
Amazon Redshift
Why it's wrong here
Redshift is for analytical queries on large datasets, not real-time time-series ingestion.
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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.