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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 Personally Identifiable Information (PII). The security team requires that the data be transparently encrypted at rest using a key stored in AWS CloudHSM. What should the database administrator do to meet this requirement?

A
Use Oracle Data Pump to export the data, encrypt it using CloudHSM, and import it back into RDS.
Why wrong: Oracle Data Pump is for data import/export, not for transparent encryption at rest. It does not meet the requirement of transparent encryption.
B
Enable TDE and configure the Oracle wallet to point to the CloudHSM key.
Why wrong: While Oracle TDE can use an external HSM via the Oracle wallet, RDS does not provide the necessary access to configure the wallet to point to CloudHSM.
C
Enable TDE and use AWS KMS as the key manager by integrating with the Oracle TDE keystore.
Why wrong: AWS KMS can be used as the key manager for Oracle TDE in RDS, but it does not support keys stored in CloudHSM. KMS custom key stores are not compatible with RDS Oracle TDE.
D
Create a custom DB engine using a custom AMI that includes CloudHSM integration.
RDS Custom for Oracle allows you to create a custom DB engine using a custom AMI, enabling integration with CloudHSM for TDE. This is the only option that meets the requirement.

Full breakdown with real-world context →

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

✓

Create a custom DB engine using a custom AMI that includes CloudHSM integration.

The requirement is to use a key stored in AWS CloudHSM for transparent encryption of an Amazon RDS for Oracle DB instance. RDS for Oracle does not natively support integrating with CloudHSM for TDE. The only viable approach to meet this requirement is to use RDS Custom for Oracle, which allows the creation of a custom DB engine using a custom AMI. With RDS Custom, you can customize the database and host environment to integrate CloudHSM with Oracle TDE. Option A is incorrect because Oracle Data Pump does not provide transparent encryption. Option B is incorrect because RDS does not allow configuring the Oracle wallet to point to an external HSM. Option C is incorrect because AWS KMS does not directly use a key stored in CloudHSM unless you set up a custom key store, but even then, RDS Oracle TDE integration with KMS does not support CloudHSM-backed keys.

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 Data Pump to export the data, encrypt it using CloudHSM, and import it back into RDS.
Why it's wrong here
Oracle Data Pump is for data import/export, not for transparent encryption at rest. It does not meet the requirement of transparent encryption.
✗
Enable TDE and configure the Oracle wallet to point to the CloudHSM key.
Why it's wrong here
While Oracle TDE can use an external HSM via the Oracle wallet, RDS does not provide the necessary access to configure the wallet to point to CloudHSM.
✗
Enable TDE and use AWS KMS as the key manager by integrating with the Oracle TDE keystore.
Why it's wrong here
AWS KMS can be used as the key manager for Oracle TDE in RDS, but it does not support keys stored in CloudHSM. KMS custom key stores are not compatible with RDS Oracle TDE.
✓
Create a custom DB engine using a custom AMI that includes CloudHSM integration.
Why this is correct
RDS Custom for Oracle allows you to create a custom DB engine using a custom AMI, enabling integration with CloudHSM for TDE. This is the only option that meets the requirement.
Related concept
Standard ACLs match source addresses.

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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. 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. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.

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.

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FAQ

Questions learners often ask

What does this DBS-C01 question test?

Database Security — This question tests Database Security — Standard ACLs match source addresses..

What is the correct answer to this question?

The correct answer is: Create a custom DB engine using a custom AMI that includes CloudHSM integration. — The requirement is to use a key stored in AWS CloudHSM for transparent encryption of an Amazon RDS for Oracle DB instance. RDS for Oracle does not natively support integrating with CloudHSM for TDE. The only viable approach to meet this requirement is to use RDS Custom for Oracle, which allows the creation of a custom DB engine using a custom AMI. With RDS Custom, you can customize the database and host environment to integrate CloudHSM with Oracle TDE. Option A is incorrect because Oracle Data Pump does not provide transparent encryption. Option B is incorrect because RDS does not allow configuring the Oracle wallet to point to an external HSM. Option C is incorrect because AWS KMS does not directly use a key stored in CloudHSM unless you set up a custom key store, but even then, RDS Oracle TDE integration with KMS does not support CloudHSM-backed keys.

What should I do if I get this DBS-C01 question wrong?

What is the key concept behind this question?

Standard ACLs match source addresses.

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