This DBS-C01 practice question tests your understanding of workload-specific database design. Compare every option against the stated constraints before choosing — the best answer satisfies all requirements, not just the most obvious one. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
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?
Amazon RDS for MySQL
Why wrong: RDS is not optimized for high-volume time-series ingestion and queries.
Amazon Timestream
Timestream is a serverless time-series database designed for IoT and operational applications.
Amazon DynamoDB
Why wrong: DynamoDB can store time-series data but lacks built-in time-series functions.
Amazon Redshift
Why wrong: Redshift is for analytical queries on large datasets, not real-time time-series ingestion.
Answer choices
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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
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.
Related concept
Read the scenario before looking for a memorised answer.
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.
Common exam traps
The trap here is that candidates often 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.
Detailed technical explanation
Timestream uses a dual-storage architecture: a memory store for recent data (configurable retention, default 24 hours) and a magnetic store for historical data, with automatic data tiering. It supports SQL-compatible queries with time-series-specific functions like `DATE_BIN`, `INTERPOLATE_LINEAR`, and `SMOOTH`, and uses a serverless model that scales ingestion and query compute independently. In real-world IoT scenarios, Timestream can handle millions of data points per second and provides sub-second query latency for recent data.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Workload-Specific Database Design — study guide chapter
Learn the concepts, then practise the questions
Workload-Specific Database Design practice questions
Targeted practice on this topic area only
All DBS-C01 questions
1,730 questions across all exam domains
AWS Certified Database Specialty DBS-C01 study guide
Full concept coverage aligned to exam objectives
DBS-C01 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise DBS-C01 questions linked to Workload-Specific Database Design.
Practise DBS-C01 questions linked to Deployment and Migration.
Practise DBS-C01 questions linked to Management and Operations.
Practise DBS-C01 questions linked to Monitoring and Troubleshooting.
Practise DBS-C01 questions linked to Database Security.
Practise DBS-C01 questions linked to DBS-C01 fundamentals.
Practise DBS-C01 questions linked to DBS-C01 scenario.
Practise DBS-C01 questions linked to DBS-C01 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Workload-Specific Database Design — This question tests Workload-Specific Database Design — Read the scenario before looking for a memorised answer..
The correct answer is: 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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
Last reviewed: Jun 24, 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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.