The correct answer is to create a snapshot of the DB instance, copy the snapshot with encryption enabled, and restore the snapshot to a new encrypted DB instance. This works because Amazon RDS does not support enabling encryption directly on an existing unencrypted instance; encryption must be applied at the snapshot level during a copy operation, which then propagates to the restored instance. On the AWS Certified Database Specialty DBS-C01 exam, this scenario tests your understanding of RDS encryption limitations and the snapshot-based migration workflow—a common trap is assuming you can modify the instance directly or that you need complex tools like RDS Custom. Remember the key principle: encryption is a snapshot-level attribute, not an instance-level toggle. A useful memory tip is “snap, copy, restore—encrypt at the copy stage.”
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 stores sensitive data in an Amazon RDS for PostgreSQL DB instance. The security team requires that all data at rest be encrypted. The instance is currently unencrypted. What is the simplest way to enable encryption with minimal downtime?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a snapshot of the DB instance, copy the snapshot with encryption enabled, and restore the snapshot to a new encrypted DB instance.
Option C is correct because creating a snapshot, copying it with encryption, and restoring a new encrypted instance is the standard approach. Option A is wrong because enabling encryption on an existing instance is not supported. Option B is wrong because moving to RDS Custom is unnecessary. Option D is wrong because you cannot modify an existing instance to enable encryption directly.
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 snapshot of the DB instance, copy the snapshot with encryption enabled, and restore the snapshot to a new encrypted DB instance.
Why this is correct
This is the standard procedure to enable encryption with minimal downtime.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use the AWS CLI to modify the DB instance and enable encryption.
Why it's wrong here
Modifying the instance does not support enabling encryption on unencrypted instances.
✗
Migrate the data to an Amazon RDS for PostgreSQL DB instance using RDS Custom.
Why it's wrong here
RDS Custom is not necessary and adds complexity.
✗
Modify the DB instance and enable encryption in the console.
Why it's wrong here
You cannot enable encryption on an existing unencrypted RDS instance directly.
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: Create a snapshot of the DB instance, copy the snapshot with encryption enabled, and restore the snapshot to a new encrypted DB instance. — Option C is correct because creating a snapshot, copying it with encryption, and restoring a new encrypted instance is the standard approach. Option A is wrong because enabling encryption on an existing instance is not supported. Option B is wrong because moving to RDS Custom is unnecessary. Option D is wrong because you cannot modify an existing instance to enable encryption directly.
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
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 migrating an on-premises Oracle database to Amazon RDS for Oracle. The database contains sensitive data that must be encrypted at rest. Which action should the company take to enable encryption on the RDS instance?
easy
A.Modify the existing RDS DB instance and enable encryption.
✓ B.Create a new RDS DB instance with encryption enabled and migrate the data.
C.Enable Oracle Transparent Data Encryption (TDE) on the existing RDS instance.
D.Take a snapshot of the existing database, encrypt the snapshot, and restore from it.
Why B: Amazon RDS for Oracle supports encryption at rest using AWS KMS. Encryption can only be enabled when the DB instance is created; you cannot encrypt an existing unencrypted RDS instance. You must either create a new encrypted instance and migrate the data, or use Oracle features like TDE. Option A is correct because you create a new encrypted instance. Option B is wrong because you cannot modify an existing instance to add encryption. Option C is wrong because you cannot encrypt a snapshot and restore from it if the original instance was unencrypted. Option D is wrong because Oracle TDE is an option but requires additional configuration; the simplest solution is to create a new encrypted instance.
Variation 2. A company is migrating an on-premises Oracle database to Amazon RDS for Oracle. The database contains personally identifiable information (PII). The security team requires that the data be encrypted at rest using a customer-managed key stored in AWS KMS. Additionally, the team wants to ensure that the key can be rotated automatically every year. What should the company do to meet these requirements?
easy
A.Enable encryption on the RDS instance using the default RDS encryption and use AWS Secrets Manager to store the key.
✓ B.Create a customer-managed key in AWS KMS, enable automatic rotation, and enable encryption on the RDS instance using that key.
C.Create a customer-managed key in AWS KMS without automatic rotation, and manually rotate the key using the RDS console.
D.Use an AWS managed key for RDS and create an AWS Lambda function to rotate the key manually each year.
Why B: Option A is correct because RDS supports encryption at rest using a KMS key, and customer-managed keys can be rotated automatically. Option B is not possible. Option C does not cover encryption at rest. Option D does not provide automatic rotation.
Last reviewed: Jun 20, 2026
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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.
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