Your company uses an S3 bucket to store data for an application. Sometimes the team also downloads the S3 files for further analysis. As the data is very important, you need to protect against accidental deletions initiated by someone or an application and restore the files when needed. Which of the following options is appropriate?

Answer options:

A.Enable the versioning feature in the S3 bucket.
B.Modify the S3 bucket to be read-only.
C.Use an S3 Lifecycle policy to transfer objects to a lower cost storage.
D.Enable the Server-Side Encryption with AWS KMS-Managed Keys (SSE-KMS).

Correct Answer – A
Option A is CORRECT: The versioning feature in Amazon S3 helps retain prior versions of objects stored in S3. Even if the current version is deleted accidentally, the data can still be recovered from the previous version. Check the reference here https://d1.awsstatic.com/whitepapers/aws-building-fault-tolerant-applications.pdf.
Option B is incorrect: The application may still need to write data in the S3 bucket. So the option is not appropriate.
Option C is incorrect: This method helps to save costs but not protect the data.
Option D is incorrect: Because the Server-Side Encryption cannot protect against accidental deletions.