单选题Which of the following represents the correct way to perform an online recovery of datafile 4， which is assigned to a tablespace called USERS？（）Ashutdown restore datafile 4； recover datafile 4； alter database open；BSql alter database datafile 4 offline

第1题：

The Outer.1Q tag represents customer VLAN ID and inner.1Q tag represents Provider VLAN？（）

• A、The Outer.1Q tag represents customer VLAN ID and inner.1Q tag represents Provider VLAN （PVLAN ）
• B、It is an effective way to achieve VLAN transparency between Provider and enterprise customer bytunneling one ser of VLAN tags inside a second VLAN tag
• C、The Outer.1Q tag represents Service VLAN （PVLAN） and inner.1Q tag represents customer VLAN
• D、QinQ is a way to hide native VLAN which can conflict with Provider native VLAN

第2题：

Your database is up and running and one of your three control files is accidentally erased. You start RMAN and run the following command：   RESTORE CONTROLFILE FROM AUTOBACKUP；   Which of the following statements is true？（） 

• A、 The command restores only the missing control file.
• B、 The command restores all the control files.
• C、 The command fails because the database is running.
• D、 This is the correct way to address this problem.
• E、 This is not the correct way to address this problem.

第3题：

第4题：

Which of the following represents a safety hazard？（）

• A、liquid on the floor
• B、a tiled floor
• C、a concrete floor
• D、carpet

第5题：

Which of the following would be the correct way to dispose of a laptop battery？ （）

• A、Place the battery on a shelf for storage.
• B、Place the battery in a trash compactor separately from the laptop.
• C、Dispose of the battery in the same manner as the laptop.
• D、Refer to the disposal information located on the battery.

第6题：

Which of the following reasons indicate why it is important to have the user demonstrate the task they are trying to perform?（）

• A、To help the technician learn how to perform the task 
• B、To determine if the user is performing the task properly 
• C、To determine if the user is authorized to perform the task 
• D、To help the technician determine if there is a better way to perform the task in question 

第7题：

Which of the following options represents the correct sequence of DHCP messages after a clientinitially boots？（）

• A、DHCPREQUEST， DHCPOFFER， DHCPDISCOVER， DHCPACK
• B、DHCPDISCOVER， DHCPOFER， DHCPREQUEST， DHCPACK
• C、DHCPOFFER， DHCPACK， DHCPREQUEST， DHCPDISCOVER
• D、DHCPDISCOVER， DHCPREQUEST， DHCPOFFER， DHCPACK
• E、DHCPREQUE5T， DHCPDISCOVER， DHCPOFFER， DHCPACK
• F、DHCPDISCOVER， DHCPACK， DHCPREQUEST， DHCPOFFER

第8题：

He is trying to find a new way to（）a living. Which of the following is not correct

Aget

Bearn

Ctake

Dmake

第9题：

Which of the following represents a wiring standard for twisted pair cables?（）

• A、Fiber
• B、T568A
• C、IEEE1394
• D、CAT5

第10题：

Which of the following is the correct term for a virtual machine？（）

• A、 Hypervisor
• B、 Guest OS
• C、 Virtual Center
• D、 Host OS