单项选择题
A system must be evaluated and tuned. In order to use a set of performance evaluation programs （e.g.， filemon， svmon， and tprof） which of the following packages should exist on the system in question？（）
A. bos.adt
B. bos.perf
C. Java.adt
D. perfagent.tools
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Whichofthefollowingcommandscanbeusedtoobtaininformationabouttheinstalledsoftware？（）
A. lslpp -L
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Whichofthefollowingcommandscanbeusedtowatchsystemerrorsastheyarelogged？（）
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Whichofthefollowingcommandscanbeusedtoobtaininformationaboutfilesetsonthesystemthatarelaterthanthecurrentmaintenancelevel？（）
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