单选题 A System p administrator needs to set the default password length for all users to six characters.  Which of the following files needs to be edited to accomplish this （）

单选题 A client needs more disk space for another volume group and has decided to use hdisk12 from the uservg volume group containing hdisk10， hdisk11， and hdisk12 where hdisk10 and hdisk11 have sufficient PPs to contain the volume group data. The client attempted to remove hdisk12 from the volume group but received the following error：  0516-016 Cannot delete physical volume with allocated partitions.  Which of the following commands should be run to correct this problem（）

单选题 How can a directory be excluded from a mksysb backup（）

单选题 A System p administrator needs to upgrade a system from AIX 5.2 to AIX 5.3.  Which of the following installation methods would minimize downtime（）

单选题 During reboot， the system hangs with an LED 0554 message that means， "The boot device could not be opened or a read failed."  Which of the following recovery procedures should be taken （）

单选题 How can an administrator determine how many physical copies there are of a mirrored logical volume in rootvg（）

单选题 A System p administrator needs to document system changes that have occurred recently. The company has a policy of making all possible changes via the smit interface.  Which of the following files would show the commands that have been performed from within smit and their resulting output（）

单选题 An  administrator  runs  mktcpip  aixhost  172.168.0.50  enO  to  change  the  network  address，  but  the  command  hangs  for  an  extended  period  of  time.   Which  of  the  following  is  the  most  likely  cause  of  the  problem（）

单选题 How  can  a  directory  named  /dirl  be  excluded  during  a  restore  of  files backed  up  by  name  with  the  backup command（）

单选题 The df command indicates that a filesystem is full， however， the du command indicates that not all space is allocated.  How would the system administrator isolate the discrepancy（）