Quick Answer
The answer is Amazon Timestream and Amazon DynamoDB with TTL. Timestream is purpose-built for time-series data, offering automatic tiered storage and optimized query performance for high-ingestion workloads, making it the obvious choice. DynamoDB, when combined with Time-to-Live (TTL), handles high-ingestion time-series by using a composite key design (e.g., device ID plus timestamp) and automatically expiring old records, which keeps storage costs manageable without sacrificing write throughput. On the AWS Certified Database Specialty DBS-C01 exam, this question tests your ability to distinguish between purpose-built services and general-purpose databases that can be adapted for time-series patterns—a common trap is overlooking DynamoDB’s TTL feature or assuming only Timestream qualifies. Remember the memory tip: “Timestream is the native, DynamoDB with TTL is the adaptive.”
This DBS-C01 practice question tests your understanding of workload-specific database design. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which TWO database services are suitable for storing time-series data with high ingestion rates? (Select TWO.)
Amazon Timestream
Purpose-built for time-series.
Amazon RDS for MySQL
Why wrong: Not optimized for high write throughput of time-series.
Amazon ElastiCache for Memcached
Why wrong: In-memory cache, not durable for time-series.
Amazon DynamoDB with TTL
Can handle high ingestion and auto-expire old data.
Amazon Redshift
Why wrong: Analytics warehouse, not for high frequency writes.
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 purpose-built for time-series. DynamoDB with TTL can be used for time-series with efficient expiration. Options C, D, E are not optimal for high ingestion time-series.
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 Timestream
Why this is correct
Purpose-built for time-series.
Related concept
Read the scenario before looking for a memorised answer.
Amazon RDS for MySQL
Why it's wrong here
Not optimized for high write throughput of time-series.
Amazon ElastiCache for Memcached
Why it's wrong here
In-memory cache, not durable for time-series.
Amazon DynamoDB with TTL
Why this is correct
Can handle high ingestion and auto-expire old data.
Related concept
Read the scenario before looking for a memorised answer.
Amazon Redshift
Why it's wrong here
Analytics warehouse, not for high frequency writes.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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 purpose-built for time-series. DynamoDB with TTL can be used for time-series with efficient expiration. Options C, D, E are not optimal for high ingestion time-series.
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 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.
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