The answer is to ensure encryption is enabled at launch and to understand that enabling encryption at rest automatically encrypts automated backups and snapshots. This is because Amazon RDS encryption, which uses AWS KMS, must be set when the DB instance is first created; you cannot encrypt an existing unencrypted RDS Oracle Multi-AZ instance after launch. When you enable encryption at rest for the primary instance, all its automated backups, manual snapshots, and replicas in the Multi-AZ configuration are encrypted using the same KMS key. On the SCS-C02 exam, this question tests your knowledge of RDS encryption limitations and the "enable at launch" rule, which is a common trap—many candidates mistakenly think encryption can be added later or that backups require a separate setting. Remember the memory tip: "Encrypt at birth, backups follow for all they're worth."
SCS-C02 Data Protection Practice Question
This SCS-C02 practice question tests your understanding of data protection. 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 data at rest for an Amazon RDS for Oracle database. The database is deployed in a Multi-AZ configuration. The company also wants to encrypt automated backups and snapshots. Which TWO steps should the security team take?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable encryption at rest when launching the RDS instance.
Option A is correct because encryption must be enabled at launch; it cannot be added later. Option C is correct because enabling encryption at rest automatically encrypts backups and snapshots. Option B is wrong because encryption cannot be enabled on an existing unencrypted instance. Option D is wrong because encryption must be enabled at launch, not after. Option E is wrong because KMS key must be specified at launch; can be changed later only for certain engines.
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 at rest when launching the RDS instance.
Why this is correct
Encryption must be enabled at launch.
Related concept
Standard ACLs match source addresses.
✗
Modify the DB instance to enable encryption after creation.
Why it's wrong here
Cannot modify; must create a new encrypted instance.
✓
Ensure that the 'Encryption at rest' setting also encrypts automated backups and snapshots.
Why this is correct
RDS encryption automatically encrypts backups and snapshots.
Related concept
Standard ACLs match source addresses.
✗
Enable encryption at rest on the existing RDS instance via a modification.
Why it's wrong here
Encryption cannot be added to an existing unencrypted instance.
✗
Specify a KMS key after the instance is launched.
Why it's wrong here
KMS key must be specified at launch.
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 SCS-C02 ACL questions on filtering logic and placement.
Data Protection — This question tests Data Protection — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Enable encryption at rest when launching the RDS instance. — Option A is correct because encryption must be enabled at launch; it cannot be added later. Option C is correct because enabling encryption at rest automatically encrypts backups and snapshots. Option B is wrong because encryption cannot be enabled on an existing unencrypted instance. Option D is wrong because encryption must be enabled at launch, not after. Option E is wrong because KMS key must be specified at launch; can be changed later only for certain engines.
What should I do if I get this SCS-C02 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 SCS-C02 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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