IBM(000-223)單項選擇題每日一練(2019.01.13)

An  administrator  can  create  logical  volumes  and  then  add  file  systems  to  them，  or  create  the  file  system directly. 
What is an dvantage of the two-step approach instead of the one-step approach（）

A System p administrator is investigating a possible security breech and wants to review 
information about failed login attempts to the system. 
Which of the following commands will show this（）

An administrator has received complaints from users that an application is not available while other applications  run. This  application  resides  on  an  NFS  mounted  filesystem.  
Which  of  the  following  commands should be run as a reasonable first step to handle this problem（）

An  administrator  must  verify  all  filesets  are  completely  installed  before  an  upgrade.  
Which  of  the following commands will perform this task（）

Given the following script， why does the output come out as an empty line instead of "dog"（）#!/bin/ksh 
$VAR=dog 
echo "${VAR}"