DBS-C01 Database Security Practice Question
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 using a customer-managed KMS key. The company also needs to ensure that the database is automatically patched by AWS. Which DB instance configuration should be used?
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
✓
Multi-AZ, encryption at rest enabled with a customer-managed KMS key, auto minor version upgrade enabled.
The requirements are encryption at rest with a customer-managed KMS key and automatic patching via auto minor version upgrade. Both B (Multi-AZ) and C (Single-AZ) meet these requirements. A fails because auto minor version upgrade is disabled. D fails because it uses an AWS-managed KMS key, not a customer-managed key. High availability is not a requirement in the stem, so both B and C are correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Single-AZ, encryption at rest enabled with a customer-managed KMS key, auto minor version upgrade disabled.
Why it's wrong here
Incorrect because auto minor version upgrade is disabled, so AWS will not automatically patch the database.
- ✓
Multi-AZ, encryption at rest enabled with a customer-managed KMS key, auto minor version upgrade enabled.
Why this is correct
Correct because it enables encryption at rest with a customer-managed KMS key and enables auto minor version upgrade. Multi-AZ provides high availability but is not required.
- ✓
Single-AZ, encryption at rest enabled with a customer-managed KMS key, auto minor version upgrade enabled.
Why this is correct
Correct because it enables encryption at rest with a customer-managed KMS key and enables auto minor version upgrade. Single-AZ is acceptable as high availability is not a requirement.
- ✗
Multi-AZ, encryption at rest enabled with an AWS-managed KMS key, auto minor version upgrade enabled.
Why it's wrong here
Incorrect because it uses an AWS-managed KMS key instead of a customer-managed key, so it does not satisfy the encryption requirement.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.