This DBS-C01 practice question tests your understanding of database security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which TWO actions should be taken to protect sensitive data in an Amazon RDS for Oracle DB instance? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Oracle Transparent Data Encryption (TDE) for sensitive columns.
Options B and D are correct. Enabling encryption at rest protects data on disk, and enabling Transparent Data Encryption (TDE) provides additional encryption for specific columns. Option A is wrong because disabling automatic backups does not enhance security. Option C is wrong because setting a public IP address increases exposure. Option E is wrong because storing credentials in the application code is insecure.
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.
✗
Store database credentials in the application configuration file.
Why it's wrong here
Credentials should not be stored in code.
✗
Disable automated backups to reduce storage costs.
Why it's wrong here
Disabling backups does not protect data.
✓
Use Oracle Transparent Data Encryption (TDE) for sensitive columns.
Why this is correct
TDE provides column-level encryption.
Related concept
Standard ACLs match source addresses.
✗
Assign a public IP address to the DB instance for easier access.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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 Transparent Data Encryption (TDE) for sensitive columns. — Options B and D are correct. Enabling encryption at rest protects data on disk, and enabling Transparent Data Encryption (TDE) provides additional encryption for specific columns. Option A is wrong because disabling automatic backups does not enhance security. Option C is wrong because setting a public IP address increases exposure. Option E is wrong because storing credentials in the application code is insecure.
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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