- A
Use an S3 bucket policy to enforce encryption for backup files.
Why wrong: RDS backups are managed internally, not via S3.
- B
Enable encryption for the RDS instance using AWS KMS.
Encrypts data at rest, automated backups, and snapshots.
- C
Enable encryption on automated backups only after creating a snapshot.
Why wrong: Does not encrypt live data.
- D
Enable encryption on the underlying EBS volumes using KMS.
Why wrong: RDS does not use EBS directly; RDS encryption is required.
Question 1,135 of 1,750
Encrypt RDS at Rest with AWS KMS Including Backups
This DOP-C02 practice question tests your understanding of security and compliance. 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 uses Amazon RDS for MySQL with Multi-AZ deployment. The security team requires that all data be encrypted at rest and that automated backups are also encrypted. Which configuration meets these requirements?
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
✓
Enable encryption for the RDS instance using AWS KMS.
Option B is correct because enabling encryption on the RDS instance using AWS KMS at creation time encrypts the data, automated backups, read replicas, and snapshots. Option A is incorrect because an S3 bucket policy cannot enforce encryption for RDS automated backups; RDS encryption must be handled at the instance level. Option C is incorrect because enabling encryption on automated backups after creating a snapshot does not encrypt the live database or future automated backups. Option D is incorrect because encrypting the underlying EBS volumes separately does not automatically encrypt the RDS data, logs, or backups; RDS encryption must be enabled directly on the instance.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 an S3 bucket policy to enforce encryption for backup files.
Why it's wrong here
RDS backups are managed internally, not via S3.
- ✓
Enable encryption for the RDS instance using AWS KMS.
Why this is correct
Encrypts data at rest, automated backups, and snapshots.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable encryption on automated backups only after creating a snapshot.
Why it's wrong here
Does not encrypt live data.
- ✗
Enable encryption on the underlying EBS volumes using KMS.
Why it's wrong here
RDS does not use EBS directly; RDS encryption is required.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
What to study next
Got this wrong? Here's your next step.
Identify which DOP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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Security and Compliance — study guide chapter
Learn the concepts, then practise the questions
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Security and Compliance practice questions
Targeted practice on this topic area only
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AWS Certified DevOps Engineer Professional DOP-C02 study guide
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How to use practice tests most effectively before exam day
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
Security and Compliance — This question tests Security and Compliance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable encryption for the RDS instance using AWS KMS. — Option B is correct because enabling encryption on the RDS instance using AWS KMS at creation time encrypts the data, automated backups, read replicas, and snapshots. Option A is incorrect because an S3 bucket policy cannot enforce encryption for RDS automated backups; RDS encryption must be handled at the instance level. Option C is incorrect because enabling encryption on automated backups after creating a snapshot does not encrypt the live database or future automated backups. Option D is incorrect because encrypting the underlying EBS volumes separately does not automatically encrypt the RDS data, logs, or backups; RDS encryption must be enabled directly on the instance.
What should I do if I get this DOP-C02 question wrong?
Identify which DOP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
3 more ways this is tested on DOP-C02
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company is using Amazon RDS for MySQL and needs to encrypt the database at rest. Which action should be taken to enable encryption?
easy- A.Create a read replica with encryption enabled
- B.Use AWS Secrets Manager to encrypt the data
- ✓ C.Enable encryption when creating the DB instance
- D.Modify the existing DB instance and enable encryption
Why C: Encryption at rest for Amazon RDS MySQL can only be enabled during the creation of the DB instance. Once the instance is created, encryption cannot be added. Option A is incorrect because while you can create an encrypted read replica from an unencrypted source, that does not encrypt the original instance. Option B is incorrect because AWS Secrets Manager is used for managing database credentials, not for encrypting data at rest. Option D is incorrect because modifying an existing DB instance does not support enabling encryption; the instance must be created with encryption enabled.
Variation 2. A DevOps team is designing a solution to encrypt data at rest for an Amazon RDS for MySQL database. Which TWO actions should the team take? (Choose TWO.)
hard- A.Enable encryption after creating the RDS instance by modifying the instance
- B.Enable SSL/TLS for the RDS instance
- ✓ C.Use AWS KMS to create a customer managed key and assign it to the RDS instance
- ✓ D.Enable encryption at rest when creating the RDS DB instance
- E.Store the database files in an encrypted S3 bucket
Why C: To encrypt data at rest for Amazon RDS for MySQL, encryption must be enabled when creating the DB instance (Option D) and a customer managed key from AWS KMS can be used (Option C). Option A is incorrect because you cannot enable encryption on an existing unencrypted RDS instance; it must be done at creation time. Option B is incorrect because SSL/TLS encrypts data in transit, not at rest. Option E is incorrect because storing database files in an encrypted S3 bucket does not encrypt the RDS instance; RDS encryption is managed by AWS KMS and is enabled at the instance level.
Variation 3. A DevOps engineer is tasked with encrypting data at rest for an Amazon RDS for MySQL database. Which TWO methods can achieve this?
medium- ✓ A.Enable encryption when creating the DB instance using a customer-managed KMS key.
- ✓ B.Enable encryption when creating the DB instance using the AWS managed KMS key.
- C.Use the default RDS encryption with a customer-managed key without KMS.
- D.Enable encryption on an existing unencrypted DB instance by modifying the instance.
- E.Use client-side encryption with the RDS SDK.
Why A: Options A and B are correct because Amazon RDS for MySQL supports encryption at rest using AWS KMS. You can enable encryption when creating the DB instance with either a customer-managed KMS key (Option A) or the AWS managed KMS key (Option B). Option C is incorrect because RDS encryption always uses AWS KMS; there is no option to use a customer-managed key without KMS. Option D is incorrect because encryption cannot be enabled on an existing unencrypted DB instance; you must create a new encrypted instance and migrate the data. Option E is incorrect because client-side encryption is not a built-in RDS feature and would require application-level changes, not a direct method of encrypting data at rest in RDS.
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Last reviewed: Jun 20, 2026
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