单项选择题
If the Call Redirect step sends a caller to a device that does not exist in the CallManager, which branch of the step is executed? （）
A.Busy B.Invalid C.Successful D.Unsuccessfu
多项选择题 Whichtwostepscheckoutadatabaseconnectionfromtheconnectionpool?（）
单项选择题 WhatistheFlushInputBuffersettingusedforintheInputtaboftheMenustep?（）
单项选择题 Whichstepcanbeusedtotrapruntimescripterrorsandrecovergracefully?（）
