PAS-C01 Technology Practice Question
A company is running SAP ERP on AWS with an Oracle database. The database is hosted on an EC2 instance with multiple EBS volumes. The company wants to encrypt the database at rest using AWS KMS. What is the correct procedure to enable encryption for the existing Oracle database without downtime?
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
✓
Use Oracle Transparent Data Encryption (TDE) with AWS KMS as the key store
Enabling EBS encryption on a running instance requires creating an encrypted snapshot, restoring a new encrypted volume, and attaching it; this involves downtime. Oracle TDE can be enabled online with minimal impact. AWS KMS does not provide database-level encryption natively; it is used for EBS encryption. Changing to RDS Custom requires migration.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable EBS encryption on the existing volumes by modifying the volume attribute
Why it's wrong here
EBS encryption cannot be enabled on existing volumes without creating a new encrypted volume, which requires downtime.
- ✗
Migrate the database to Amazon RDS Custom for Oracle with encryption enabled
Why it's wrong here
Migrating to RDS Custom would involve downtime and is not the simplest solution for encrypting an existing database.
- ✓
Use Oracle Transparent Data Encryption (TDE) with AWS KMS as the key store
Why this is correct
Oracle TDE can be enabled online with minimal downtime and can use AWS CloudHSM or KMS as the key store.
- ✗
Use AWS KMS to encrypt the EBS volumes by creating a new encrypted volume and attaching it
Why it's wrong here
This process requires detaching the old volume and attaching the new one, causing downtime.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PAS-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 PAS-C01 exam.