Please do all the problems

How, typically, are multiple open() and close() operations handled on a single file? register of access rights Otwo-level internal table system-wide table stacked pointers Question 2 (1 point) Logical record size is determined in a manner that matches existing physical record size True False Question 3 (1 point) Which access type should be used when there is a need for a fast access to massive amounts of data? O index access index-sequential access O direct access sequential access Question 4 11 point) Absolute disk access allows the operating system to decide where to place a file should not be directly modified by the user is used in a direct communication with the user helps solve the allocation problem Question 5 (1 point) The simple operation of listing the contents of a specific directory, when unprotected, may be a threat to system security. True False Question 6 (1 point) UNIX systems allow groups to be created and modified by any owner of the file any superuser automatic privilege determination procedures any member of the group Question 7 (1 point) Which classifications of users are used in a UNIX access control list? owner, group owner, guest, universe owner, group, universe Question 8 (1 point) The I/O control level consists of device drivers device drivers and interrupt handlers device drivers, interrupt handlers, and the file system device drives, interrupt handlers, the file system, and virtual memory Question 9 (1 point) When a layered structure is used for file system implementation, the risk of duplication of code increases. True False