The answer is Oracle fine-grained auditing for specific columns on RDS, because Amazon RDS for Oracle natively supports this feature to create an audit policy that targets only the columns containing PII, and the logs can be stored in a custom table to meet the 5-year retention requirement. This approach works by defining an audit policy with a column clause, which captures every SQL query that reads or modifies the specified columns without generating noise from other database activity. On the AWS Certified Database Specialty DBS-C01 exam, this question tests your understanding of RDS-supported Oracle security features versus unsupported enterprise tools like Oracle Audit Vault, and it often appears as a trap where you must remember that database activity streams capture all activity but cannot filter by column and lack default long-term retention. A common memory tip is “FGA for columns, custom table for years”—if you need column-level filtering and long retention, fine-grained auditing with a custom table is the only RDS-compatible path.
DBS-C01 Database Security Practice Question
This DBS-C01 practice question tests your understanding of database security. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 has an Amazon RDS for Oracle DB instance that stores sensitive data. The security team wants to audit all SQL queries that read or modify specific columns containing personally identifiable information (PII). The audit logs must be stored for 5 years. Which solution should the database specialist implement?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Oracle fine-grained auditing to create an audit policy on the specific columns and store logs in a custom table.
Option C is correct because Amazon RDS for Oracle supports fine-grained auditing using the AUDIT policy for specific columns. Option A is wrong because RDS does not support Oracle Audit Vault. Option B is wrong because database activity streams capture all activities but do not filter by column; also they are stored in CloudWatch Logs, not for 5 years by default. Option D is wrong because RDS Enhanced Monitoring is for OS metrics, not SQL auditing.
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
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Use Oracle fine-grained auditing to create an audit policy on the specific columns and store logs in a custom table.
Enable database activity streams and send logs to Amazon CloudWatch Logs with a retention of 5 years.
Why it's wrong here
Activity streams capture all activities, not column-specific; retention can be set but filtering is not column-based.
✗
Enable RDS Enhanced Monitoring and enable SQL auditing in the parameter group.
Why it's wrong here
Enhanced Monitoring provides OS metrics, not SQL audit.
✗
Enable Oracle Audit Vault and Database Firewall.
Why it's wrong here
RDS does not support Oracle Audit Vault.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
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.
KKey Concepts to Remember
Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.
TExam Day Tips
→Check inbound versus outbound direction.
→Read the ACL from top to bottom.
→Look for a broader permit or deny above the intended line.
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
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
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 DBS-C01 ACL questions on filtering logic and placement.
Database Security — This question tests Database Security — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Use Oracle fine-grained auditing to create an audit policy on the specific columns and store logs in a custom table. — Option C is correct because Amazon RDS for Oracle supports fine-grained auditing using the AUDIT policy for specific columns. Option A is wrong because RDS does not support Oracle Audit Vault. Option B is wrong because database activity streams capture all activities but do not filter by column; also they are stored in CloudWatch Logs, not for 5 years by default. Option D is wrong because RDS Enhanced Monitoring is for OS metrics, not SQL auditing.
What should I do if I get this DBS-C01 question wrong?
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 DBS-C01 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Question Discussion
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