- A
Create the stored procedure as a function instead.
Why wrong: Converting a stored procedure to a function does not change its replication behavior; both are replicated identically.
- B
Modify the DB parameter group to enable binary logging.
Correct. Enabling binary logging ensures all DDL changes are logged, which helps in replication consistency and provides the ability to recover from replication issues that might cause a stored procedure to be missing after failover.
- C
Ensure that the stored procedure is created on both the primary and standby instances by using a script or manually recreating it after failover.
Why wrong: Incorrect. Stored procedures are automatically replicated in Multi-AZ deployments via storage-level replication, so manually creating them again is unnecessary and not a proper preventive action.
- D
Increase the binlog retention period to ensure the stored procedure is captured.
Why wrong: Increasing the binlog retention period affects how long binary log files are kept, but does not directly prevent missing stored procedures after failover. It might help with recovery, but enabling binary logging is the more fundamental preventive step.
Ensure Stored Procedures Exist on Both Primary and Standby
This DBS-C01 practice question tests your understanding of management and operations. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 running an Amazon RDS for MySQL DB instance with Multi-AZ deployment. The database experiences a failover due to a hardware failure. After the failover, the application team reports that a critical stored procedure is missing. What should the database administrator do to prevent this issue in the future?
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
Modify the DB parameter group to enable binary logging.
In Amazon RDS MySQL Multi-AZ deployments, all database objects including stored procedures are replicated via synchronous storage-level replication. Therefore, a missing stored procedure after a failover is unlikely and indicates a potential replication issue. To prevent this, enabling binary logging ensures that DDL statements (such as CREATE PROCEDURE) are captured in binary logs. This allows binary log replication to maintain consistency, reduces the risk of orphaned objects, and provides the ability to recover using point-in-time restore if needed. Thus, modifying the DB parameter group to enable binary logging is the best preventive measure.
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.
- ✗
Create the stored procedure as a function instead.
Why it's wrong here
Converting a stored procedure to a function does not change its replication behavior; both are replicated identically.
- ✓
Modify the DB parameter group to enable binary logging.
Why this is correct
Correct. Enabling binary logging ensures all DDL changes are logged, which helps in replication consistency and provides the ability to recover from replication issues that might cause a stored procedure to be missing after failover.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Ensure that the stored procedure is created on both the primary and standby instances by using a script or manually recreating it after failover.
Why it's wrong here
Incorrect. Stored procedures are automatically replicated in Multi-AZ deployments via storage-level replication, so manually creating them again is unnecessary and not a proper preventive action.
- ✗
Increase the binlog retention period to ensure the stored procedure is captured.
Why it's wrong here
Increasing the binlog retention period affects how long binary log files are kept, but does not directly prevent missing stored procedures after failover. It might help with recovery, but enabling binary logging is the more fundamental preventive step.
Common exam traps
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.
Detailed technical explanation
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.
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
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Questions learners often ask
What does this DBS-C01 question test?
Management and Operations — This question tests Management and Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Modify the DB parameter group to enable binary logging. — In Amazon RDS MySQL Multi-AZ deployments, all database objects including stored procedures are replicated via synchronous storage-level replication. Therefore, a missing stored procedure after a failover is unlikely and indicates a potential replication issue. To prevent this, enabling binary logging ensures that DDL statements (such as CREATE PROCEDURE) are captured in binary logs. This allows binary log replication to maintain consistency, reduces the risk of orphaned objects, and provides the ability to recover using point-in-time restore if needed. Thus, modifying the DB parameter group to enable binary logging is the best preventive measure.
What should I do if I get this DBS-C01 question wrong?
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
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