Which term describes a group of sectors within a disk that the filesystem uses to organize files?

• A. Sectors
• B. Clusters
• C. Slack Space
• D. Garbage Collection

Answer: (B)

Clusters describe how a filesystem groups sectors into allocation units to organize files on disk. While a disk is divided into tiny sectors, the filesystem uses larger blocks called clusters to store and manage data. This grouping makes it easier to track which blocks belong to which file and to allocate space efficiently. A file can span multiple clusters, with the filesystem keeping a mapping from the file to the clusters it uses. Slack space refers to the unused portion of the last cluster when a file doesn’t perfectly fill it, which is separate from the concept of the allocation unit itself. Garbage collection is a maintenance process that reclaims and reorganizes space, often on SSDs, rather than describing the unit used to organize files.