What is the AWS service that stores files, folders, and objects via web APIs?

• A. Elastic Compute Cloud (EC2)
• B. Simple Storage Service (S3)
• C. Glacier
• D. DynamoDB

Answer: (B)

The service is Simple Storage Service. It is designed for scalable object storage you interact with over web APIs, using buckets to hold objects identified by unique keys. You can perform operations like uploading, retrieving, listing, and deleting via HTTP REST calls or through AWS SDKs, and the console as well. The “folders” you see are a virtual organization created by using slashes in object keys, not separate directory structures, which is characteristic of object storage. This makes S3 ideal for storing unstructured data such as files, images, backups, and logs.

Elastic Compute Cloud is for running virtual machines, not storage. Glacier is long-term archival storage with slower retrieval, not general-purpose access via APIs for frequent reads/writes. DynamoDB is a NoSQL database, not a file/object store.