An administrator created a .env file in a user’s home directory to configure a number of custom environment variables for a local application. However， after the user logs out and then logs back into the system， the custom variables are not being set What is the most likely reason that the custom .env file is being ignored？（）
第1题：
An administrator is using a protocol analyzer to monitor traffic between two servers. However, theonly traffic that appears is broadcast and traffic originating from the administrator‘s PC.Which of the following devices is the administrator plugged into? （）
A.Hub
B. Bridge
C. Switch
D. Router
第2题：
SQL语句建索引的语句是（）
第3题：
A.NEW;
B.DISPSTRV;
C.CREA;
D.MODIFY。
第4题：
An administrator has ordered a new server and setup a dedicated RAID 1 array for the application database. While troubleshooting with performance monitoring tools， the administrator is receiving lowerread/write speeds than expected. Which of the following would be the MOST likely cause for the lower performance？（）
第5题：
用下列（）命令，可以启动菜单设计器.
第6题：
向已有表中添加新字段或约束的SQL语句是 ______。
A．CREA TATEBLE
B．ALTER TABLE
C．DROP
D．CREATE INDEX
第7题：
在SQL中，建立规则用的命令是（）。
第8题：
An administrator is experiencing availability issues on a Linux server. The administrator decides tocheck the server for an IP address conflict on the server. Which of the following commands should the administrator use?（）
A.traceroute
B.tracert
C.ifconfig
D.ipconfig
第9题：
Windows默认帐户应如何管理（）
第10题：
An administrator attempts to install the latest security patches for an older server. When the administrator runs the patch installer， the install fails. The administrator tries again， and the installer fails again. Which of the following is the MOST likely reason for this？（）