Final answer:
The statement that is NOT true is 'B. You should share the root directory of a disk.' Sharing the root directory can lead to security risks. Option B is correct.
Step-by-step explanation:
The question which asks "Which of the following statements is NOT true?" is related to best practices in managing file system security and accessibility. The statement that is NOT true among the options provided is:
B. You should share the root directory of a disk
Sharing the root directory of a disk can pose serious security risks as it potentially gives access to all files and folders on the disk. On the contrary, security best practices recommend that:
C. You should apply the most restrictive access necessary for a shared directory - This ensures that users have only the permissions they need to perform their tasks, thus minimizing the risk of unauthorized access or changes.
D. File-systems are frequently based on hierarchical models - This is also a true statement, as most file systems, including those in popular operating systems like Windows, macOS, and Linux, organize files in a hierarchy of directories.
It's advisable to apply restrictive access as needed, and it is true that file-systems operate on hierarchical models.