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22. We call an external device a Dedicated Device: 1) if it can execute only one function; 21 if it can be assigned to one job at a time; f it can execute one dedicated function with many jobs at the same time if it has a dedicated driver in the OS 5) if it can work only with dedicated jobs. 23. The goal of the seek strategies used by Device Handler is: 1) to find data; 2) to find a correct device for the operation 3) to find a correct driver for the device; 4pto minimize the arm movement; 5) to minimize the size of the storage necessary for the data. 24. Fail-soft operation is: 1) an operation that deals only with software errors 2) the ability of the OS to handle any software error; ability of the OS to fail in such a way that preserves as much capacity and data as possible; 4) the ability of the OS to check programs for errors; 5) the ability of the OS to notify user about program errors. 25. The following diagram, where P5 has allocated resource R5 that is being requested by process P6 which has allocated resource R4 that is being requested by process P5, is an example of R4 p5 P6 RS 1) a graph that cannot be reduced; 2) a system in a deadlocked state 3) a circular wait; all the above. 26. A file system in LINUX is using a directory structure that is: 3: a tree ) a list of file names and attributes; 3) a single-level directory 4) a two-level directory 5) a circular list