单项选择题
A. sysdumpdev -p
B. sysdumpdev -s
C. sysdumpstart -p
D. sysdumpstart -s
单项选择题 WhichfileisNOTcontrolledbythealogcommand?（）
单项选择题 Apatchhasbeenappliedtotheoperatingsystem.Afterrebooting,thesystemishung.Whichofthefollowingcommandsshouldhavebeenperformedtopreventthesystemfromhanging?（）
单项选择题 Whichofthefollowingkdbsubcommandsshouldbeenteredtoobtaininformationaboutaserialport?（）