Question 1mediummulti select
Full question →mediummulti selectObjective-mapped
A transactional application uses Amazon RDS for MySQL in a single Availability Zone. The team wants the database to fail over automatically if the primary DB instance becomes unavailable, and they want the application to recover with minimal code changes. Which two actions should they take? Select two.
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
Convert the database to an RDS Multi-AZ deployment.
Correct. RDS Multi-AZ is the AWS-managed availability feature designed for automatic failover to a standby in another Availability Zone. It preserves the database endpoint and reduces recovery time without requiring the application to implement its own replica-selection logic.
B
Best answer
Have the application connect to the RDS endpoint by DNS name and reconnect after failures.
Correct. During failover, RDS updates the endpoint to point to the new primary instance, so the application should connect using the managed endpoint rather than a fixed IP address. The app also needs retry logic or connection re-establishment so transient disconnects during failover do not cause a prolonged outage.
C
Distractor review
Add a read replica and promote it manually during an outage.
Incorrect. Read replicas are primarily for read scaling and disaster recovery patterns that usually require operational intervention. Manual promotion does not satisfy automatic failover, and it introduces more downtime and more runbook steps than a Multi-AZ deployment.
D
Distractor review
Store the current DB instance IP address in the application configuration file.
Incorrect. Hard-coding the IP address couples the application to one underlying instance and breaks the abstraction RDS provides. Failover changes the active instance, so the IP would become stale and connectivity would fail instead of recovering automatically.
E
Distractor review
Rely on nightly snapshots because they provide automatic failover to another Availability Zone.
Incorrect. Automated backups and snapshots are for point-in-time recovery and long-term restore, not live failover. They do not keep a standby database ready to take over immediately when the primary instance becomes unavailable.
Common exam trap
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Technical deep dive
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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.
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Convert the database to an RDS Multi-AZ deployment. — For automatic failover with minimal application change, the database should use RDS Multi-AZ. That gives AWS-managed standby infrastructure in another Availability Zone and handles failover for the database engine. The application should also connect through the RDS endpoint and be able to reconnect after a disconnect, because the endpoint is what remains stable across failover while the underlying instance changes. A read replica is not the standard automatic failover mechanism for this requirement and usually needs manual promotion. Hard-coding an IP undermines the managed endpoint abstraction and makes recovery brittle. Snapshots are useful for restore after corruption or deletion, but they do not provide live standby capacity or automatic failover behavior.
What should I do if I get this SAA-C03 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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