Question 1,451 of 1,570
SCS-C02 Data Protection Practice Question
A security engineer is tasked with ensuring that all data stored in an RDS DB instance is encrypted at rest. The database is already running and contains data. What should the engineer do?
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
✓
Create a snapshot of the DB instance, copy it with encryption, and restore the encrypted snapshot
RDS does not support enabling encryption at rest on an existing DB instance directly. The only way to encrypt an existing unencrypted DB instance is to take a snapshot, create an encrypted copy of the snapshot, and restore it to a new encrypted DB instance. Therefore, option C is correct. Option A (changing the KMS key) does not enable encryption; it only changes the key for an already encrypted instance. Option B (modifying storage type) does not enable encryption either. Option D (enabling encryption in console) is not possible for an existing instance.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Change the KMS key associated with the DB instance
Why it's wrong here
Changing the KMS key does not enable encryption.
- ✗
Modify the DB instance to use an encrypted storage type
Why it's wrong here
No such modification exists.
- ✓
Create a snapshot of the DB instance, copy it with encryption, and restore the encrypted snapshot
Why this is correct
This is the recommended method to enable encryption on an existing DB instance.
- ✗
Enable encryption at rest in the RDS console for the existing DB instance
Why it's wrong here
Encryption at rest cannot be enabled on an existing DB instance.
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Last reviewed: Jun 20, 2026
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