- A
Deploy Amazon Aurora MySQL with a read replica.
Why wrong: Aurora is not MariaDB.
- B
Deploy a Multi-AZ RDS for MariaDB with one or more read replicas.
Combines HA and read scaling.
- C
Deploy a Multi-AZ RDS for MariaDB instance.
Why wrong: Provides HA but not read scaling.
- D
Deploy a single-AZ RDS for MariaDB with a read replica.
Why wrong: Read replica provides read scaling but no HA for writes.
Question 1,100 of 1,730
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.
A company is deploying a new web application that requires a highly available MariaDB database. The application is read-heavy and needs to scale read traffic. Which deployment approach meets these requirements?
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
✓
Deploy a Multi-AZ RDS for MariaDB with one or more read replicas.
Option B is correct because deploying a Multi-AZ RDS for MariaDB provides high availability through automatic failover to a standby in a different Availability Zone, while adding one or more read replicas offloads read traffic from the primary instance, meeting the read-heavy scaling requirement. This combination ensures both fault tolerance and read scalability for a MariaDB 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.
- ✗
Deploy Amazon Aurora MySQL with a read replica.
Why it's wrong here
Aurora is not MariaDB.
- ✓
Deploy a Multi-AZ RDS for MariaDB with one or more read replicas.
Why this is correct
Combines HA and read scaling.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Deploy a Multi-AZ RDS for MariaDB instance.
Why it's wrong here
Provides HA but not read scaling.
- ✗
Deploy a single-AZ RDS for MariaDB with a read replica.
Why it's wrong here
Read replica provides read scaling but no HA for writes.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Amazon Aurora MySQL with MariaDB, or assume that Multi-AZ alone provides read scaling, when in fact read replicas are required for read-heavy workloads.
Detailed technical explanation
How to think about this question
RDS for MariaDB Multi-AZ deployments use synchronous replication to a standby instance in a different AZ, ensuring zero data loss during failover (automatic failover typically completes within 1-2 minutes). Read replicas use asynchronous replication from the primary, which can introduce replication lag, but they can be promoted to standalone instances if needed. In a read-heavy scenario, distributing reads across multiple read replicas reduces load on the primary, while Multi-AZ ensures the database remains available even if an AZ fails.
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: Deploy a Multi-AZ RDS for MariaDB with one or more read replicas. — Option B is correct because deploying a Multi-AZ RDS for MariaDB provides high availability through automatic failover to a standby in a different Availability Zone, while adding one or more read replicas offloads read traffic from the primary instance, meeting the read-heavy scaling requirement. This combination ensures both fault tolerance and read scalability for a MariaDB database.
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
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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