AWS Certified Solutions Architect – Associate (SAA-C03) — Question 105

A company uses Amazon S3 to store its confidential audit documents. The S3 bucket uses bucket policies to restrict access to audit team IAM user credentials according to the principle of least privilege. Company managers are worried about accidental deletion of documents in the S3 bucket and want a more secure solution.
What should a solutions architect do to secure the audit documents?

Answer options

• A. Enable the versioning and MFA Delete features on the S3 bucket.
• B. Enable multi-factor authentication (MFA) on the IAM user credentials for each audit team IAM user account.
• C. Add an S3 Lifecycle policy to the audit team's IAM user accounts to deny the s3:DeleteObject action during audit dates.
• D. Use AWS Key Management Service (AWS KMS) to encrypt the S3 bucket and restrict audit team IAM user accounts from accessing the KMS key.

Correct answer: A

Explanation

Enabling versioning and MFA Delete on the S3 bucket protects against accidental deletions by allowing previous versions of objects to be restored and requiring MFA for deletion. Option B improves user authentication but does not prevent deletion. Option C restricts deletion during specific periods but does not provide a comprehensive solution. Option D focuses on encryption, which secures data at rest but does not address the risk of deletion.