单项选择题
Which of the following dbx commands should be used to obtain a stack trace from a coredump file?（）
A.trace B.where C.status D.which
单项选择题 WhichofthefollowingoutputswillbestindicateifasystemisCPUbound?（）
单项选择题 Whichofthefollowingcommandsshouldbeusedtocheckwhetherasystemdumpisvalidandreadable?（）
单项选择题 Ifasystemadministratorwantstoshowonlyadiskreportfordisk2,attwosecondintervals,whatisthecorrectcommandtorun?（）
