单项选择题
A.filesystem will contain 100GB files
B.filesystem resides on a 32-bit system
C.filesystem contains a large number of small files
D.filesystem compression is required
单项选择题 Anadministratorneedstochangeasystem’srunlevelfromlevel2tolevel3.Whatistheappropriatemethodtoaccomplishthis（）
单项选择题 Anadministratorneedstobeabletolistthenumberandsizeofbackupsetsonatape.Whichofthefollowingproceduresaccomplishthis（）
单项选择题 Auserwantstobepermanentlyaddedtothedbagroup.Whichofthefollowingcommandsorprocessescanbeusedtoaccomplishthis（）