The answer is that replication is typically less than 1 second between regions, which is the primary consideration for Aurora Global Database. This ultra-low latency is achieved through storage-based replication that operates at the physical layer, bypassing the database engine to keep secondary regions nearly synchronized without impacting write performance on the primary. On the AWS Certified Database Specialty DBS-C01 exam, this concept tests your understanding of how Aurora Global Database differs from standard cross-region read replicas—a common trap is confusing the two, but Global Database uses dedicated clusters with a single primary writer and up to five secondary readers, not traditional read replicas. Remember that failover to a secondary region is automatic and fast because the storage layer is already consistent, and no services like DMS or S3 are involved. A useful memory tip: think of it as "storage-synced, not engine-synced," meaning the replication happens below the SQL layer, ensuring sub-second lag even across continents.
DBS-C01 Deployment and Migration Practice Question
This DBS-C01 practice question tests your understanding of deployment and migration. 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 THREE considerations are important when deploying Amazon Aurora Global Database? (Choose 3.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Each secondary region can have up to 16 read replicas
Aurora Global Database supports up to 5 secondary regions, uses storage-based replication, and allows failover to a secondary region. Option C (cross-region read replicas) is not used; instead Global Database uses dedicated clusters. Option D (DMS) is not required. Option E (S3) is not used.
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.
✗
AWS DMS must be used to set up replication
Why it's wrong here
Global Database uses built-in storage replication, not DMS.
✓
Each secondary region can have up to 16 read replicas
Why this is correct
Each secondary region supports up to 16 read replicas.
Related concept
Read the scenario before looking for a memorised answer.
✗
Cross-region read replicas are created for each secondary region
Why it's wrong here
Global Database uses a dedicated cluster per region, not cross-region read replicas.
✗
Amazon S3 is used to store transaction logs
Why it's wrong here
Logs are stored in the cluster volume, not S3.
✓
Replication is typically less than 1 second between regions
Why this is correct
Global Database replication latency is typically under 1 second.
Related concept
Read the scenario before looking for a memorised answer.
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.
Deployment and Migration — This question tests Deployment and Migration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Each secondary region can have up to 16 read replicas — Aurora Global Database supports up to 5 secondary regions, uses storage-based replication, and allows failover to a secondary region. Option C (cross-region read replicas) is not used; instead Global Database uses dedicated clusters. Option D (DMS) is not required. Option E (S3) is not used.
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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Question Discussion
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