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

单项选择题Asystemisexperiencingperformanceproblems.AftercheckingtheCPUusage,theproblemidentifiedisthatthesystemis CPUBound .WhichofthefollowingoutcomeswilldetermineifthereisapossibleCPUconstraint?（）

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

单项选择题Ifasystemadministratorwantstoshowonlyadiskreportfordisk2,attwosecondintervals,whatisthecorrectcommandtorun?（）

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

单项选择题WhatdoestheFREQcolumnshowwhenrunningthetprofoption?（）

A. Total amount of Ticks used by all users 
B. Total amount of Ticks used by all processes 
C. Total amount of Ticks used by a specific user 
D. Total amount of Ticks used by a specific type of process

单项选择题Whichofthefollowingcommandscanbeusedtodetermineifadiskdriveiscausingabottleneck?（）

A. vmstat 
B. fileplace 
C. iostat 
D. lvmstat

单项选择题Whatistheproperwaytostartasystemdumponthedefaultprimarydumpdevice?（）

A. sysdumpdev -p 
B. sysdumpdev -s 
C. sysdumpstart -p 
D. sysdumpstart -s