The correct action is to create a snapshot of the DB instance, copy the snapshot with a new KMS key, and restore the DB instance from the copied snapshot. This is required because RDS does not allow you to directly modify or re-encrypt an existing encrypted DB instance with a different KMS key; the encryption key is immutable once set at launch. The only supported method to re-encrypt an RDS instance with a new key involves this snapshot-copy-restore workflow, which effectively creates a new encrypted instance under the new key. On the AWS Certified Database Specialty DBS-C01 exam, this concept tests your understanding of RDS encryption limitations and the snapshot lifecycle—a common trap is assuming you can use a point-in-time restore or modify the instance directly, but both preserve the original key. Memory tip: “Snap, copy, restore—keys change, instances don’t.”
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.
Network Topology
Refer to the exhibit. The output is from the AWS CLI for an RDS instance. The security team suspects that the encryption key used for this DB instance has been compromised. What is the required action to re-encrypt the instance with a new key?
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 a new KMS key, and restore the DB instance from the copied snapshot.
RDS does not allow changing the encryption key of an existing encrypted DB instance. The only way is to take a snapshot, copy it with a new KMS key, and restore from that snapshot. Option A is wrong because you cannot modify the KMS key directly. Option B is wrong because restoring to a point in time uses the same key. Option D is wrong because enabling encryption on an unencrypted instance requires a snapshot restore, but this instance is already encrypted.
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 a new KMS key, and restore the DB instance from the copied snapshot.
Why this is correct
This process allows re-encryption with a new key.
Related concept
Read the scenario before looking for a memorised answer.
✗
Modify the DB instance to use a new KMS key.
Why it's wrong here
RDS does not allow modifying the KMS key of an existing instance.
✗
Restore the DB instance to a point in time and specify a new KMS key.
Why it's wrong here
Point-in-time restore uses the original key.
✗
Enable encryption on a new DB instance and migrate the data.
Why it's wrong here
This instance is already encrypted; migration would require downtime.
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 a new KMS key, and restore the DB instance from the copied snapshot. — RDS does not allow changing the encryption key of an existing encrypted DB instance. The only way is to take a snapshot, copy it with a new KMS key, and restore from that snapshot. Option A is wrong because you cannot modify the KMS key directly. Option B is wrong because restoring to a point in time uses the same key. Option D is wrong because enabling encryption on an unencrypted instance requires a snapshot restore, but this instance is already encrypted.
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. The security team reports that the database 'mydb' is not encrypted. However, the CLI output shows 'StorageEncrypted' is true. What is the MOST likely reason for the security team's concern?
hard
A.The database is using a default AWS managed key instead of a customer-managed key.
✓ B.The KMS key specified may have been disabled or deleted, causing the database to be inaccessible or not encrypted.
C.The 'StorageEncrypted' field is false, but the CLI output shows true.
D.The database is not using a KMS key and is instead using a CloudHSM key.
Why B: Option C is correct. The KMS key ID is in the output, but the security team might be concerned about the key being disabled or deleted. Option A is wrong because 'StorageEncrypted' is true. Option B is wrong because there is no HSM requirement. Option D is wrong because the key is specified.
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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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