Default ACL permissions are mainly used for what purpose?

• A. Inheritance of ACL entries
• B. Storing file ownership
• C. Defining access for the owner only
• D. Controlling the mask

Answer: (A)

Default ACL permissions define which ACL entries should be applied to new files and subdirectories created inside a directory. This makes ACLs inheritance the central idea: when something new is created in the directory, the system copies the default entries from the directory to the new object, giving it the intended access rights automatically. This helps maintain consistent access rules across a project tree without manually setting permissions for every new item. Note that default ACLs only affect items created after the default is set, and the directory’s default mask exists to bound the effective rights for named users and groups in the inherited ACL. Ownership is still determined by ownership attributes, not by the default ACL.