Which of the following is a file storage service option in distributed storage systems?

• A. Block storage
• B. File storage
• C. Object storage
• D. HDFS storage

Answer: (B)

The main idea is how data is organized and accessed in distributed storage: by blocks, files, or objects. A file storage service is built around a traditional file system model, offering a hierarchical structure of directories and files and enabling file-level operations through standard file protocols like NFS or SMB. This makes it ideal for shared folders, user home directories, and applications that expect a familiar file-system interface. Block storage provides raw blocks to a client and relies on a separate file system inside, which is different from offering a direct file-based service. Object storage stores data as objects with metadata in a flat namespace, optimized for scalability and unstructured data, but it doesn’t provide a traditional file hierarchy. HDFS storage is a distributed file system used in Hadoop ecosystems, a specialized implementation rather than a general file storage service option. So the option that represents a file-based storage service is the one that gives a hierarchical file system interface.