This DBS-C01 practice question tests your understanding of deployment and migration. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
Refer to the exhibit. A database administrator runs the AWS CLI command and gets the following output: {"Engine":"mysql","DBInstanceStatus":"available","MultiAZ":true,"SecondaryAvailabilityZone":"us-east-1b"}. What can be concluded about the database deployment?
The database is a Single-AZ deployment.
Why wrong: MultiAZ is true.
The database has a Read Replica in a different Availability Zone.
Why wrong: Read Replicas are not shown by this field.
The database is an Amazon Aurora cluster.
Why wrong: Engine is mysql, not aurora.
The database is a Multi-AZ deployment with a standby in a different Availability Zone.
MultiAZ true and SecondaryAZ present.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The database is a Multi-AZ deployment with a standby in a different Availability Zone.
The output shows `"MultiAZ":true` and `"SecondaryAvailabilityZone":"us-east-1b"`, which are explicit indicators of a Multi-AZ deployment for an RDS MySQL instance. In a Multi-AZ deployment, Amazon RDS automatically provisions and maintains a synchronous standby replica in a different Availability Zone, and the `SecondaryAvailabilityZone` field confirms the standby's location. This matches option D exactly.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
The database is a Single-AZ deployment.
Why it's wrong here
MultiAZ is true.
The database has a Read Replica in a different Availability Zone.
Why it's wrong here
Read Replicas are not shown by this field.
The database is an Amazon Aurora cluster.
Why it's wrong here
Engine is mysql, not aurora.
The database is a Multi-AZ deployment with a standby in a different Availability Zone.
Why this is correct
MultiAZ true and SecondaryAZ present.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates confuse the `SecondaryAvailabilityZone` field with a Read Replica or Aurora's multi-AZ nature, but only a Multi-AZ deployment with a synchronous standby explicitly populates this field in the describe output for a non-Aurora RDS instance.
Trap categories for this question
Command / output trap
Read Replicas are not shown by this field.
Detailed technical explanation
In RDS Multi-AZ deployments, the synchronous replication is handled at the storage layer using block-level replication, and failover is automatic with no changes to the connection string. The `SecondaryAvailabilityZone` field is only populated when Multi-AZ is enabled, and it reveals the exact AZ where the standby resides. This is distinct from Aurora, which uses a shared cluster volume and can have up to 15 replicas, but does not expose a `SecondaryAvailabilityZone` in the same manner.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
Deployment and Migration — This question tests Deployment and Migration — Read the scenario before looking for a memorised answer..
The correct answer is: The database is a Multi-AZ deployment with a standby in a different Availability Zone. — The output shows `"MultiAZ":true` and `"SecondaryAvailabilityZone":"us-east-1b"`, which are explicit indicators of a Multi-AZ deployment for an RDS MySQL instance. In a Multi-AZ deployment, Amazon RDS automatically provisions and maintains a synchronous standby replica in a different Availability Zone, and the `SecondaryAvailabilityZone` field confirms the standby's location. This matches option D exactly.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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