- A
Enable encryption using the AWS Management Console by selecting the instance and choosing 'Enable Encryption'.
Why wrong: No such option in console for existing instances.
- B
Modify the DB instance and set the KMS key ID to enable encryption.
Why wrong: Modifying does not enable encryption.
- C
Copy the snapshot to an encrypted snapshot and then restore.
Why wrong: You must enable encryption during the copy step.
- D
Take a snapshot of the instance, copy the snapshot with encryption enabled, and restore from the encrypted snapshot.
This is the standard method.
Question 1,111 of 1,730
DBS-C01 Database Security Practice Question
This DBS-C01 practice question tests your understanding of database security. 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 needs to encrypt an existing unencrypted Amazon RDS for Oracle DB instance. Which set of steps should be followed?
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
✓
Take a snapshot of the instance, copy the snapshot with encryption enabled, and restore from the encrypted snapshot.
Option D is the correct procedure. To encrypt an existing unencrypted RDS DB instance, you must create a manual snapshot of the instance, then copy that snapshot with encryption enabled (specifying a KMS key), and finally restore a new DB instance from the encrypted snapshot. Option A is wrong because the console does not provide a direct 'Enable Encryption' action on an existing instance. Option B is wrong because you cannot modify an existing unencrypted instance to enable encryption directly; there is no such modification parameter. Option C is wrong because while it mentions copying the snapshot to an encrypted one, it does not clarify that encryption is applied during the copy operation, and the correct process explicitly requires taking the initial snapshot, copying with encryption, and then restoring; Option D includes all three steps.
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.
- ✗
Enable encryption using the AWS Management Console by selecting the instance and choosing 'Enable Encryption'.
Why it's wrong here
No such option in console for existing instances.
- ✗
Modify the DB instance and set the KMS key ID to enable encryption.
Why it's wrong here
Modifying does not enable encryption.
- ✗
Copy the snapshot to an encrypted snapshot and then restore.
Why it's wrong here
You must enable encryption during the copy step.
- ✓
Take a snapshot of the instance, copy the snapshot with encryption enabled, and restore from the encrypted snapshot.
Why this is correct
This is the standard method.
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: Take a snapshot of the instance, copy the snapshot with encryption enabled, and restore from the encrypted snapshot. — Option D is the correct procedure. To encrypt an existing unencrypted RDS DB instance, you must create a manual snapshot of the instance, then copy that snapshot with encryption enabled (specifying a KMS key), and finally restore a new DB instance from the encrypted snapshot. Option A is wrong because the console does not provide a direct 'Enable Encryption' action on an existing instance. Option B is wrong because you cannot modify an existing unencrypted instance to enable encryption directly; there is no such modification parameter. Option C is wrong because while it mentions copying the snapshot to an encrypted one, it does not clarify that encryption is applied during the copy operation, and the correct process explicitly requires taking the initial snapshot, copying with encryption, and then restoring; Option D includes all three steps.
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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Last reviewed: Jun 20, 2026
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