AWS (Amazon Web Services) Certification Practice Exam

What is one of the use cases for versioning in S3?

1. Data encryption for security

2. Recovering from accidental deletions

3. Reducing data transfer costs

4. Providing real-time analytics

The correct answer is: Recovering from accidental deletions

Versioning in Amazon S3 (Simple Storage Service) is a key feature that helps manage and preserve multiple versions of objects within a bucket. One significant use case for versioning is the ability to recover from accidental deletions. When versioning is enabled on an S3 bucket, every time an object is overwritten or deleted, a new version is created rather than replacing the existing object. This means the previous versions of the object are retained and can be accessed or restored as needed. In the case of accidental deletion, users can simply retrieve the last version of the object, thus preventing data loss. This capability provides a safety net for data management, allowing for better data protection and recovery strategies. Not only does this safeguard against accidental deletions, but it also aids in scenarios where previous versions of data may need to be accessed for auditing, compliance, or historical reference. While other options present valid aspects of S3's functionality, they do not relate to the unique advantage provided by versioning. For example, data encryption for security is focused on protecting data during transit and at rest but does not inherently relate to version control. Reducing data transfer costs is more about optimizing the transfer mechanics rather than managing the versions of data. Providing real-time analytics pertains