In UNIX, what is a link?

• A. A directory entry
• B. A pointer to another file or subdirectory
• C. Implemented as an absolute or relative path name
• D. All of the mentioned

The deletion of a link ________ the original file.

• A. Deletes
• B. Affects
• C. Does not affect
• D. None of the mentioned

When keeping a list of all the links/references to a file, and the list is empty, implies that _____________

• A. The file has no copies
• B. The file is deleted
• C. The file is hidden
• D. None of the mentioned

When a cycle exists, the reference count maybe non zero, even when it is no longer possible to refer to a directory or file, due to _______

• A. The possibility of one hidden reference
• B. The possibility of two hidden references
• C. The possibility of self referencing
• D. None of the mentioned

Some directory information is kept in main memory or cache to ___________

• A. Fill up the cache
• B. Increase free space in secondary storage
• C. Decrease free space in secondary storage
• D. Speed up access

A systems program such as fsck in ______ is a consistency checker.

• A. Unix
• B. Windows
• C. Macintosh
• D. Solaris

A consistency checker __________________ and tries to fix any inconsistencies it finds.

• A. Compares the data in the secondary storage with the data in the cache
• B. Compares the data in the directory structure with the data blocks on disk
• C. Compares the system generated output and user required output
• D. All of the mentioned

Each set of operations for performing a specific task is a _________

• A. Program
• B. Code
• C. Transaction
• D. All of the mentioned

Once the changes are written to the log, they are considered to be ________

• A. Committed
• B. Aborted
• C. Completed
• D. None of the mentioned

When an entire committed transaction is completed, ___________

• A. It is stored in the memory
• B. It is removed from the log file
• C. It is redone
• D. None of the mentioned