- A
Use an eventually consistent read model to improve performance.
Why wrong: Eventual consistency does not provide ACID.
- B
Implement Amazon Aurora Global Database for cross-Region ACID transactions.
Aurora Global Database provides ACID within each region.
- C
Adopt a saga pattern to manage distributed transactions.
Why wrong: Saga pattern is for eventual consistency.
- D
Use Amazon DynamoDB Transactions for multi-item ACID operations.
DynamoDB Transactions provide ACID.
- E
Implement DynamoDB Streams to capture changes for audit.
Why wrong: Streams are for change data capture, not ACID.
Question 1,466 of 1,730
Distributed ACID Compliance Patterns — Aurora Global Database and DynamoDB Transactions
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.
Which TWO design patterns help meet ACID compliance requirements in a distributed database environment while maintaining high availability?
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
✓
Implement Amazon Aurora Global Database for cross-Region ACID transactions.
Amazon Aurora Global Database is designed to support cross-Region ACID transactions by using a primary cluster in one AWS Region and up to five secondary read-only clusters in other Regions. It replicates data asynchronously from the primary to the secondary Regions, but each secondary cluster can be promoted to a primary in under a minute, ensuring high availability while maintaining ACID compliance for transactions that span multiple Regions.
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.
- ✗
Use an eventually consistent read model to improve performance.
Why it's wrong here
Eventual consistency does not provide ACID.
- ✓
Implement Amazon Aurora Global Database for cross-Region ACID transactions.
Why this is correct
Aurora Global Database provides ACID within each region.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Adopt a saga pattern to manage distributed transactions.
Why it's wrong here
Saga pattern is for eventual consistency.
- ✓
Use Amazon DynamoDB Transactions for multi-item ACID operations.
Why this is correct
DynamoDB Transactions provide ACID.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Implement DynamoDB Streams to capture changes for audit.
Why it's wrong here
Streams are for change data capture, not ACID.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The DBS-C01 exam often tests the distinction between ACID-compliant distributed transactions and patterns that provide only eventual consistency or compensation-based semantics, leading candidates to select the saga pattern or eventually consistent models as valid ACID solutions.
Detailed technical explanation
How to think about this question
Aurora Global Database uses a storage-based replication mechanism that writes redo log records from the primary to the secondary Regions, enabling sub-second replication lag and crash-consistent secondary clusters. DynamoDB Transactions use a two-phase commit protocol internally to ensure atomicity and isolation across multiple items within a single table or across tables in the same AWS Region, but they do not support cross-Region ACID transactions. The trap here is that candidates often confuse eventual consistency with ACID compliance, or they incorrectly assume that any distributed transaction pattern (like saga) inherently provides ACID guarantees.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
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: Implement Amazon Aurora Global Database for cross-Region ACID transactions. — Amazon Aurora Global Database is designed to support cross-Region ACID transactions by using a primary cluster in one AWS Region and up to five secondary read-only clusters in other Regions. It replicates data asynchronously from the primary to the secondary Regions, but each secondary cluster can be promoted to a primary in under a minute, ensuring high availability while maintaining ACID compliance for transactions that span multiple Regions.
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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