- A
Configure cross-Region automated backups to copy backups to another Region.
Cross-Region automated backups provide an RPO of a few minutes and allow restore in the secondary Region.
- B
Configure an AWS DMS task to replicate data from the primary RDS Oracle instance to an RDS Oracle instance in another Region.
DMS provides ongoing replication with low RPO.
- C
Enable Multi-AZ on the primary RDS instance.
Why wrong: Multi-AZ provides high availability within a single Region, not cross-Region DR.
- D
Create a cross-Region read replica of the Oracle DB instance.
Why wrong: Cross-Region read replicas are not supported for Oracle RDS.
- E
Use Amazon Aurora Global Database to replicate data across Regions.
Why wrong: Aurora Global Database is for Aurora, not Oracle.
Question 867 of 1,730
DBS-C01 Workload-Specific Database Design Practice Question
This DBS-C01 practice question tests your understanding of workload-specific database design. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 runs a critical Oracle database on Amazon RDS. They need to implement a disaster recovery strategy that provides the lowest possible recovery point objective (RPO) and recovery time objective (RTO) across AWS Regions. Which TWO actions should they take? (Choose two.)
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
✓
Configure cross-Region automated backups to copy backups to another Region.
Option A is correct because cross-Region automated backups copy RDS snapshots and transaction logs to a secondary Region, enabling point-in-time recovery with an RPO of minutes and an RTO of hours (depending on snapshot restore time). Option B is correct because AWS DMS with ongoing replication (change data capture) can continuously replicate Oracle data to a standby instance in another Region, achieving an RPO of seconds and an RTO of minutes by failing over to the replicated instance.
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.
- ✓
Configure cross-Region automated backups to copy backups to another Region.
Why this is correct
Cross-Region automated backups provide an RPO of a few minutes and allow restore in the secondary Region.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Configure an AWS DMS task to replicate data from the primary RDS Oracle instance to an RDS Oracle instance in another Region.
Why this is correct
DMS provides ongoing replication with low RPO.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable Multi-AZ on the primary RDS instance.
Why it's wrong here
Multi-AZ provides high availability within a single Region, not cross-Region DR.
- ✗
Create a cross-Region read replica of the Oracle DB instance.
Why it's wrong here
Cross-Region read replicas are not supported for Oracle RDS.
- ✗
Use Amazon Aurora Global Database to replicate data across Regions.
Why it's wrong here
Aurora Global Database is for Aurora, not Oracle.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Multi-AZ with cross-Region DR, or incorrectly assume Oracle RDS supports cross-Region read replicas like MySQL or PostgreSQL, but Oracle RDS does not offer that feature.
Detailed technical explanation
How to think about this question
Cross-Region automated backups rely on Amazon S3 cross-Region replication of backup data, with a typical RPO of 5–15 minutes based on log upload frequency. AWS DMS uses Oracle LogMiner or Oracle GoldenGate-compatible change data capture to stream transactions to the target, requiring supplemental logging to be enabled; the target must be pre-loaded and ongoing replication configured to minimize lag. In a real-world scenario, combining both options provides a layered DR approach: DMS for near-real-time replication and automated backups for long-term retention and recovery from logical corruption.
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.
TExam Day Tips
- 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.
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FAQ
Questions learners often ask
What does this DBS-C01 question test?
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: Configure cross-Region automated backups to copy backups to another Region. — Option A is correct because cross-Region automated backups copy RDS snapshots and transaction logs to a secondary Region, enabling point-in-time recovery with an RPO of minutes and an RTO of hours (depending on snapshot restore time). Option B is correct because AWS DMS with ongoing replication (change data capture) can continuously replicate Oracle data to a standby instance in another Region, achieving an RPO of seconds and an RTO of minutes by failing over to the replicated instance.
What should I do if I get this DBS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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