In the two-level directory, if a user refers to a particular file then Select one: a. only his/her own UFD (user file directory) is searched b. first UFD (user file directory) is searched, then MFD (master file directory) c. first MFD (master file directory) is searched, then UFD (user file directory) d. only MFD (master file directory) is searched

c. first MFD (master file directory) is searched, then UFD (user file directory)

Explanation:

The location on a disk where computers stores data is generally known as a directory. The file information contained in a directory are namely; type, name, protection, mounting, position, location, size and usage. Also, a user may decide to perform one of these operations in a directory;

1. Create a file.

2. Delete a file.

3. Search for a file.

4. Rename a file.

5. List and traverse a directory.

The two-level directory structure, ensures that individual user has his or her own user file directory (UFD). The user file directories (UFD) are unique and have the same structures, and as such lists only the files of each user.

Please note that in the two-level directory, if a user refers to a particular file first MFD (master file directory) is searched, then UFD (user file directory) because the MFD is the highest level in the directory or it is at the top of the directory.

However, in the two-level directory, if a user refers to a particular file by its name only his or her own UFD (user file directory) is searched.

For instance, in the computer operating system, when a user enters his or her username only his or her own user file directory (UFD) is searched.

Hence, the two-level directory is more reliable than a single-level directory as it is used to solve the problem associated with name-collisions.