DBS-C01 Workload-Specific Database Design Practice Question
This DBS-C01 practice question tests your understanding of workload-specific database design. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 is designing a database for a global application that requires low-latency reads and writes across multiple AWS regions. The application data is key-value and does not require complex queries. The team needs strong consistency for critical data. Which TWO services should they consider? (Choose TWO.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Amazon DynamoDB Global Tables
DynamoDB Global Tables provide multi-region replication with strong consistency option. Option A is wrong because RDS cross-region read replicas do not support writes in multiple regions. Option D is wrong because S3 is not a database for key-value low-latency. Option E is wrong because ElastiCache is a cache, not a durable database.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 Global Tables
Why this is correct
DynamoDB Global Tables replicate data across regions and support strong consistency.
Related concept
Read the scenario before looking for a memorised answer.
✗
Amazon S3 with cross-region replication
Why it's wrong here
S3 is object storage, not a low-latency key-value database.
✗
Amazon ElastiCache for Redis with global datastore
Why it's wrong here
ElastiCache is an in-memory cache, not a primary database.
✓
Amazon Aurora Global Database
Why this is correct
Aurora Global Database allows low-latency global reads and disaster recovery.
Related concept
Read the scenario before looking for a memorised answer.
✗
Amazon RDS for PostgreSQL with cross-region read replicas
Why it's wrong here
Read replicas are read-only; cannot write in secondary region.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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
How to think about this question
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.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
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
Got this wrong? Here's your next step.
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.
Workload-Specific Database Design — This question tests Workload-Specific Database Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Amazon DynamoDB Global Tables — DynamoDB Global Tables provide multi-region replication with strong consistency option. Option A is wrong because RDS cross-region read replicas do not support writes in multiple regions. Option D is wrong because S3 is not a database for key-value low-latency. Option E is wrong because ElastiCache is a cache, not a durable database.
What should I do if I get this DBS-C01 question wrong?
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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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
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