The answer is to create a snapshot, copy it with encryption, and restore from that encrypted snapshot. This is the only supported path because Amazon RDS for SQL Server does not allow you to directly enable encryption at rest on an existing, unencrypted DB instance; you must first take a manual snapshot, then use the copy-snapshot operation to apply a customer-managed KMS key, and finally restore the instance from that newly encrypted snapshot. On the AWS Certified Database Specialty DBS-C01 exam, this scenario tests your understanding that encryption is a snapshot-level attribute, not an instance-level toggle, and the common trap is assuming you can simply modify the instance or that Multi-AZ deployment automatically encrypts data. Remember the three-step mantra: snapshot, copy with KMS, restore — never try to encrypt a live instance directly.
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 is running an Amazon RDS for SQL Server DB instance with Multi-AZ deployment. The security team wants to ensure that all data at rest is encrypted using a customer-managed key stored in AWS KMS. Which steps must be taken to achieve this? (Choose THREE.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Copy the snapshot and specify encryption with a KMS key.
Options A, C, and E are correct. To encrypt an existing unencrypted RDS instance, you must create a snapshot, copy the snapshot with encryption using a KMS key, and then restore the DB instance from the encrypted snapshot. Option B is incorrect because you cannot enable encryption on an existing DB instance directly. Option D is incorrect because Multi-AZ deployment does not automatically encrypt data.
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.
✗
Modify the DB instance and enable encryption.
Why it's wrong here
RDS does not allow enabling encryption on an existing instance.
✗
Enable Multi-AZ deployment to encrypt data at rest.
Why it's wrong here
Multi-AZ does not encrypt data.
✓
Copy the snapshot and specify encryption with a KMS key.
Why this is correct
Copying a snapshot allows you to enable encryption.
Related concept
Read the scenario before looking for a memorised answer.
✓
Create a manual snapshot of the existing DB instance.
Why this is correct
A snapshot is needed to copy with encryption.
Related concept
Read the scenario before looking for a memorised answer.
✓
Restore the DB instance from the encrypted snapshot.
Why this is correct
Restoring from the encrypted snapshot creates an encrypted instance.
Related concept
Read the scenario before looking for a memorised answer.
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 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. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. 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.
Identify which DBS-C01 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.
Database Security — This question tests Database Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Copy the snapshot and specify encryption with a KMS key. — Options A, C, and E are correct. To encrypt an existing unencrypted RDS instance, you must create a snapshot, copy the snapshot with encryption using a KMS key, and then restore the DB instance from the encrypted snapshot. Option B is incorrect because you cannot enable encryption on an existing DB instance directly. Option D is incorrect because Multi-AZ deployment does not automatically encrypt data.
What should I do if I get this DBS-C01 question wrong?
Identify which DBS-C01 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
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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 running an Amazon RDS for SQL Server instance with Multi-AZ deployment. The security team requires that all data at rest be encrypted. The instance was originally launched without encryption. What is the most efficient way to enable encryption at rest for this existing instance?
medium
A.Modify the DB instance and set the encryption attribute to true.
B.Use AWS Database Migration Service (DMS) to migrate the data to a new encrypted RDS instance.
✓ C.Take a snapshot of the DB instance, copy the snapshot with encryption enabled, and restore the encrypted snapshot to a new DB instance.
D.Create a read replica with encryption enabled and promote it to become the primary instance.
Why C: Option C is correct because you cannot directly enable encryption on an existing unencrypted RDS instance; you must create a snapshot, copy it with encryption, and restore the encrypted snapshot to a new instance. Option A is wrong because modifying the DB instance does not support enabling encryption. Option B is wrong because enabling encryption requires a snapshot copy, not just creating an encrypted read replica. Option D is wrong because while you could migrate data manually, it is less efficient than snapshot restoration.
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This DBS-C01 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 DBS-C01 exam.
Question Discussion
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