Quick Answer
The correct answer is Multi-AZ deployment because it provides automatic failover to a standby Oracle instance in a different Availability Zone, ensuring high availability with minimal downtime. This RDS Oracle Multi-AZ deployment synchronously replicates data to the standby and automatically redirects traffic during an AZ failure, meeting the critical requirement for automatic failover without manual intervention. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your ability to distinguish between managed high-availability features and manual configurations—a common trap is confusing Read Replicas (which only support read scaling, not failover) or assuming Oracle Data Guard is needed, but RDS Multi-AZ handles failover automatically. Remember the memory tip: "Multi-AZ for automatic, Read Replicas for read."
This SAP-C02 practice question tests your understanding of accelerate workload migration and modernization. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 migrating a legacy application that uses an Oracle database to AWS. The application is critical and requires high availability with automatic failover. The company wants to use Amazon RDS for Oracle. The database size is 200 GB. The company needs a solution that provides automatic failover to a standby instance in a different Availability Zone with minimal downtime. Which RDS deployment option should the company use?
Multi-Region deployment with Read Replicas
Why wrong: Read Replicas do not provide automatic failover.
Single-AZ deployment with Oracle Data Guard
Why wrong: Data Guard is not natively managed by RDS; requires manual setup.
Single-AZ deployment with automatic backups
Why wrong: No failover; backups are for point-in-time recovery.
Multi-AZ deployment
Multi-AZ provides automatic failover with a standby in a different AZ.
Answer choices
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
Option A is correct because Multi-AZ deployment for RDS provides automatic failover to a standby instance in a different AZ. Option B is wrong because Read Replicas are for read scaling, not automatic failover. Option C is wrong because Single-AZ does not provide failover. Option D is wrong because Oracle Data Guard requires manual configuration and is not managed by RDS automatically.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Multi-Region deployment with Read Replicas
Why it's wrong here
Read Replicas do not provide automatic failover.
Single-AZ deployment with Oracle Data Guard
Why it's wrong here
Data Guard is not natively managed by RDS; requires manual setup.
Single-AZ deployment with automatic backups
Why it's wrong here
No failover; backups are for point-in-time recovery.
Multi-AZ deployment
Why this is correct
Multi-AZ provides automatic failover with a standby in a different AZ.
Related concept
Standard ACLs match source addresses.
Common exam traps
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
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
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related SAP-C02 ACL questions on filtering logic and placement.
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FAQ
Accelerate Workload Migration and Modernization — This question tests Accelerate Workload Migration and Modernization — Standard ACLs match source addresses..
The correct answer is: Multi-AZ deployment — Option A is correct because Multi-AZ deployment for RDS provides automatic failover to a standby instance in a different AZ. Option B is wrong because Read Replicas are for read scaling, not automatic failover. Option C is wrong because Single-AZ does not provide failover. Option D is wrong because Oracle Data Guard requires manual configuration and is not managed by RDS automatically.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related SAP-C02 ACL questions on filtering logic and placement.
Standard ACLs match source addresses.
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Last reviewed: Jun 20, 2026
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