Which command synchronizes or rebuilds the logical volume control block, the device configuration database, and the volume group descriptor areas on the physical volumes?（）

单项选择题What can be done to enable the debug information for functions to be displayed when using ‘ksh - x’to debug a script?（）

A.Run the script using 'ksh -fx'.
B.Run the script using 'ksh -a function -x'.
C.Edit the script and add 'set -x' at the beginning.
D.Edit the script and add 'set -x' at the beginning of each function.

单项选择题An administrator is installing AIX 6.1 on a new LPAR and the boot sequence has stalled with reference code 0c31. What is the most likely cause?（）

A.The system is waiting for user input to define console type lft0.
B.The system is waiting for user input to define console type tty0.
C.The system is waiting for user input to define console type vty0.
D.The system is waiting for user input to define console type vsa0.

单项选择题An LPAR has hung during a reboot, reporting a 0552LED code. What does this signify?（）

A.varyon of the paging device failed.
B.fsck of the root (/) filesystem failed.
C.varyon of the root volume group failed.
D.IPL device could not be opened or a read failed.

单项选择题A booting system appears to be hanging with an LED code of 0c54. What is the likely cause?（）

A.An AIX install is in progress.
B.The rootvg volume group is corrupt.
C.The TCPIP configuration is incorrect.
D.At least one paging device cannot be varied on.

单项选择题An application writes to a log file in the logs filesystem that is full. After the log file is deleted, df still shows the filesystem as 100% full. What is the likely cause of the problem and what will resolve it?（）

A.The deleted file is still open by the application.The system must be rebooted before'df' will show the reduction in the filesystem.
B.The deleted file is still open by the application.The application must be stoppedbefore 'df' will show the reduction in the filesystem.
C.The filesystem is still marked as full in the /etc/fs.status file.The system must be rebooted before 'df' will show the reduction in the filesystem.
D.The filesystem is still marked as full in the /etc/fs.status file.The application must be stopped before 'df' will show the reduction in the filesystem.