- A
Multi-AZ deployment
Aurora automatically replicates data across AZs, providing failover.
- B
DynamoDB Accelerator (DAX)
Why wrong: DAX is for DynamoDB, not Aurora.
- C
Amazon Aurora Replicas
Aurora Replicas provide read scaling and failover support.
- D
Amazon Aurora
Aurora provides high availability and performance.
- E
Amazon RDS Proxy
Why wrong: RDS Proxy is for connection pooling, not failover.
Question 261 of 1,730
DBS-C01 Deployment and Migration Practice Question
This DBS-C01 practice question tests your understanding of deployment and migration. 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 is deploying a new application on AWS that requires a highly available relational database with automatic failover and read scaling. The database size is 100 GB and the workload is balanced between reads and writes. Which THREE AWS services or features should be used?
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
✓
Multi-AZ deployment
Multi-AZ deployment (Option A) is correct because it provides automatic failover for Amazon RDS by provisioning a synchronous standby replica in a different Availability Zone. If the primary DB instance fails, Amazon RDS automatically fails over to the standby, ensuring high availability without manual intervention. This directly meets the requirement for automatic failover in a relational database scenario.
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.
- ✓
Multi-AZ deployment
Why this is correct
Aurora automatically replicates data across AZs, providing failover.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
DynamoDB Accelerator (DAX)
Why it's wrong here
DAX is for DynamoDB, not Aurora.
- ✓
Amazon Aurora Replicas
Why this is correct
Aurora Replicas provide read scaling and failover support.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Amazon Aurora
Why this is correct
Aurora provides high availability and performance.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon RDS Proxy
Why it's wrong here
RDS Proxy is for connection pooling, not failover.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse Amazon RDS Proxy with a high-availability or failover solution, but it only manages connections and does not replicate data or provide automatic failover.
Detailed technical explanation
How to think about this question
Amazon Aurora Replicas (Option C) support up to 15 low-lag read replicas that can serve read traffic and, in the event of a failure, can be promoted to a primary instance in under a minute, providing both read scaling and failover capability. Amazon Aurora (Option D) is a MySQL- and PostgreSQL-compatible relational database engine that automatically replicates data six ways across three Availability Zones, offering high durability and availability. Together, Multi-AZ deployment (for RDS) or Aurora's built-in replication (for Aurora) and Aurora Replicas satisfy the balanced read/write workload with automatic failover and read scaling.
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?
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: Multi-AZ deployment — Multi-AZ deployment (Option A) is correct because it provides automatic failover for Amazon RDS by provisioning a synchronous standby replica in a different Availability Zone. If the primary DB instance fails, Amazon RDS automatically fails over to the standby, ensuring high availability without manual intervention. This directly meets the requirement for automatic failover in a relational database scenario.
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.
About these practice questions
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Last reviewed: Jul 4, 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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