AWS (Amazon Web Services) Certification Practice Exam

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What does Elastic Block Store (EBS) provide to EC2 instances?

Object storage
Block level storage
File storage
Cold storage

The correct answer is: Block level storage

Elastic Block Store (EBS) provides block level storage to EC2 instances. This means that EBS allows you to create storage volumes that can be attached to EC2 instances. As a block storage service, EBS operates at a lower level than file storage, dealing with data in blocks instead of files, which offers advantages for databases and applications that require frequent read and write operations. Block storage is optimized for performance and is suitable for use cases where applications need quick access to data, such as boot volumes for operating systems, application data, and databases. This type of storage ensures that data can be stored and accessed rapidly, essential for applications that demand high I/O performance. In contrast, the other options focus on different types of storage: object storage is typically used for unstructured data and is key in services like Amazon S3; file storage provides a shared file system, usually in a network context like Amazon EFS; and cold storage refers to long-term data archival solutions like Amazon S3 Glacier, which are designed for infrequently accessed data. Therefore, EBS's role as block level storage is distinct and critical for specific application needs associated with EC2 instances.