A. du B. df C. fsck D. ncheckAsystemadministratorthinks……

单项选择题WhichofthefollowingproceduresbestexplainshowtoenabletheNISnameresolutiontotakeprecedenceoverDNSonasystem-widebasis?（）

A. Add the following line to /etc/netsvc.conf: hosts = nis,bind,local 
B. edit /etc/netsvc.conf to add the following: process /full/path/of/process \{ hosts = local,nis,dns} 
C. In an NIS and DNS environment, NIS takes precedence over DNS in this environment resulting in no change 
D. Change the NSORDER environment variable 

单项选择题AsystemmustbeupgradedfromAIX5.1to5.2.Whichofthefollowingschedulingprocessesshouldbeperformed?（）

A. Schedule enough down time to backup, upgrade and reboot. 
B. Backup, upgrade, then schedule enough down time to reboot the system. 
C. Backup, then schedule enough down time to upgrade and reboot the system. 
D. No scheduling processes are necessary because no down time is required.

单项选择题Whereisthesuloglocated?（）

A. /var 
B. /var/adm 
C. /var/perf 
D. /var/spool

单项选择题Whichofthefollowingcommandscanbeusedtogainrootprivilegesandprofilewithoutinitiallylogginginasroot?（）

A. su 
B. su root 
C. su - root 
D. su -c "root"

单项选择题WhichofthefollowingisTRUEabouterrorprocessing?（）

A.The error daemon runs in the foreground and reads the /etc/errpt file. 
B.The error daemon is invoked by the user when required and it reads the /usr/lib/errpt. 
C.The error daemon is invoked whenever the error occurs and it reads the /usr/lib/errpt. 
D.The error daemon /usr/lib/errdemon runs in the background on most machines and reads the /dev/error special file.