A patch has been applied to the operating system.  After rebooting, the system is hung.  Which of the following commands should have been performed to prevent the system from hanging?（）

单项选择题Whichofthefollowingkdbsubcommandsshouldbeenteredtoobtaininformationaboutaserialport?（）

A. tty
B. stat
C. trace
D. stream

单项选择题Whichlogfileshowspreviousinstallationinformation?（）

A. /var/adm/ras/bosinstlog 
B. /var/adm/ras/devinst.log 
C. /var/adm/rshlog 
D. /var/adm/sulog

单项选择题Whichofthefollowingcommandsshouldbeusedtoobtainadetailedoutputofthesystemerrorlog?（）

A. errpt -d 
B. errpt -a 
C. errpt -D 
D. errpt -i /var/adm/ras/diag_log

单项选择题Communicationwitharemotehosthasfailed.WhichcommandisLEASThelpfulinisolatingthefailure?（）

A. ping RemoteHostName 
B. ping RemoteHostIPaddr 
C. nslookup RemoteHostName 
D. ping lo0

单项选择题Afterasystemhasrebootedfromasystemcrash,whichofthefollowingcommandsshouldberuntofindthelocationofthedump?（）

A. lsvg -l rootvg 
B. sysdumpdev -e 
C. sysdumpdev -L 
D. cd /var/adm/ras