Which of the following kdb commands is used to obtain a stack trace from a dump? （）

Asystemisexperiencingperformanceproblems.AftercheckingtheCPUusage,theproblemidentifiedisthatthesystemis CPUBound .WhichofthefollowingoutcomeswilldetermineifthereisapossibleCPUconstraint?（）

A. Low paging 
B. High paging 
C. Workload manager is not turned on 
D. A high run queue length 

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Ifasystemadministratorwantstoshowonlyadiskreportfordisk2,attwosecondintervals,whatisthecorrectcommandtorun?（）

A. iostat disk1 1 
B. iostat -d disk1 2 
C. iostat disk2 1 
D. iostat -d disk2 2

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