What type of storage structure does object storage employ to maintain files? 

Answer options:

A. Directory
B. Hierarchical
C. tree
D. Flat

D

Object storage uses a flat file system to hold storage objects; it assigns files a key value that is then used to access them, rather than relying on directories or descriptive filenames. Typical storage layouts such as tree, directory, and hierarchical structures are used within volume storage, whereas object storage maintains a flat structure with key values.