The answer is to create a new encrypted RDS DB instance and migrate the data, because encryption at rest for Amazon RDS MySQL can only be enabled at launch time and cannot be added to an existing unencrypted instance. This is a fundamental architectural constraint: when you enable encryption at rest on an RDS instance, AWS uses AWS KMS to encrypt the underlying storage, automated backups, read replicas, and snapshots at the volume level, and this setting is immutable after creation. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this concept frequently appears in questions testing your understanding of RDS lifecycle management and security configuration, with a common trap being the mistaken belief that you can modify an existing instance to add encryption. Remember the memory tip: "Encrypt at birth, or migrate for worth"—encryption must be decided when the DB instance is born, or you must rebuild by migrating data to a new encrypted instance.
SOA-C02 Security and Compliance Practice Question
This SOA-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 wants to encrypt data at rest in an Amazon RDS for MySQL DB instance. Which solution meets this requirement with minimal administrative overhead?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a new encrypted DB instance and migrate the data.
Option B is correct because RDS encryption at rest is enabled at launch and cannot be added later. Option A is wrong because enabling encryption after launch is not supported. Option C is wrong because application-level encryption adds overhead. Option D is wrong because RDS does not use S3 for storage.
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.
✓
Create a new encrypted DB instance and migrate the data.
Why this is correct
Encryption must be enabled at creation time.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use application-level encryption to encrypt data before storing it in the DB.
Enable encryption on the existing DB instance by modifying the DB instance.
Why it's wrong here
Encryption cannot be enabled on an existing DB instance.
✗
Store the data in an S3 bucket with encryption enabled and use RDS to access it.
Why it's wrong here
RDS does not use S3 as a storage backend.
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.
What to study next
Got this wrong? Here's your next step.
Identify which SOA-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.
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: Create a new encrypted DB instance and migrate the data. — Option B is correct because RDS encryption at rest is enabled at launch and cannot be added later. Option A is wrong because enabling encryption after launch is not supported. Option C is wrong because application-level encryption adds overhead. Option D is wrong because RDS does not use S3 for storage.
What should I do if I get this SOA-C02 question wrong?
Identify which SOA-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 →
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 data at rest. Which action should be taken to enable encryption?
easy
A.Use the RDS console to enable encryption on the existing DB instance.
B.Use AWS KMS to create a customer master key and assign it to the existing DB instance.
C.Modify the existing RDS DB instance and enable encryption.
✓ D.Create a new RDS DB instance with encryption enabled.
Why D: Amazon RDS for MySQL does not support enabling encryption on an existing DB instance. Encryption at rest must be enabled at the time of instance creation. Therefore, the correct action is to create a new RDS DB instance with encryption enabled, and then migrate the data from the unencrypted instance to the new encrypted one.
Last reviewed: Jun 20, 2026
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This SOA-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SOA-C02 exam.
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