DBS-C01 Database Security Practice Question
Exhibit
Refer to the exhibit.
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"kms:Decrypt",
"kms:GenerateDataKey"
],
"Resource": "arn:aws:kms:us-east-1:123456789012:key/abc12345-1234-1234-1234-123456789012"
},
{
"Effect": "Allow",
"Action": [
"rds:CreateDBSnapshot",
"rds:ModifyDBInstance"
],
"Resource": "*"
}
]
}An IAM policy is attached to a role used by an application to access an Amazon RDS for MySQL DB instance. The DB instance is encrypted with a customer-managed KMS key. The application is unable to create a snapshot of the encrypted DB instance. Which missing permission is the most likely cause?
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
✓
kms:CreateGrant
To create a snapshot of an encrypted RDS DB instance, the IAM role must have the kms:CreateGrant permission on the customer-managed KMS key. This permission allows RDS to create a grant that enables it to use the key for encrypting the snapshot. Without kms:CreateGrant, the snapshot creation fails. Options A (kms:ReEncrypt), B (kms:DescribeKey), and D (kms:Encrypt) are not required for this operation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
kms:ReEncrypt
Why it's wrong here
kms:ReEncrypt is not required for snapshot creation.
- ✗
kms:DescribeKey
Why it's wrong here
kms:DescribeKey is not required for snapshot creation.
- ✓
kms:CreateGrant
Why this is correct
RDS needs kms:CreateGrant to authorize RDS to use the KMS key for snapshot operations.
- ✗
kms:Encrypt
Why it's wrong here
kms:Encrypt is not needed for snapshot creation.
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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.