单项选择题 The mksysb command completed successfully. Which of the following steps are necessary to verify the mksysb is good?（）

单项选择题 A system administrator needs to backup datavg which contains a database that pre-allocates files by padding them with nulls, similar to treating them as sparse files. In order to effectively backup and be able to restore the datavg files, which backup method should be used?（）

单项选择题 Which of the following sequence of commands should be used to list the directories and files saved on a mksyst tape that has been rewound and placed in device rmt0?（）