单项选择题
A. renice -n -20 {PID}
B. renice -n 20 {PID}
C. renice -n -40 {PID}
D. renice -n 40 {PID}
单项选择题 Thenfsstat-ccommandshowszerobadxid，butretransandtimeoutsaresizeable，whatisthemostprobablecauseoftheproblem？（）
单项选择题 Asystemhasusersdoinginteractiveworkwhilebackgroundjobsarerunning.Interactiveusersarerequestingthatsystemresponsetimebeimprovedforforegroundprocesses.Whichtuningparametersshouldbechangedtoaccomplishthis？（）
单项选择题 Whichofthefollowingtoolsisusedtoreportthelocationoflogicalpartitionsofafilesystemonaphysicalvolume？（）