DBS-C01 Deployment and Migration Practice Question
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?
⚠ Common exam trap
Many exam-takers 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.
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.
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.
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.
- ✗
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.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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