多项选择题 You perform a Server Core Installation of Windows Server 2012 R2 on a server named Server1. You need to add a graphical user interface (GUI) to Server1. Which tool should you use?（）

单项选择题 Your network contains an Active Directory domain named contoso.com. The domain contains two servers named Server1 and Server2. Server1 runs Windows Server 2012 R2.Server2 runs Windows Server 2008 R2 Service Pack 1 (SP1) and has the DHCP Server server role installed. You need to manage DHCP on Server2 by using the DHCP console on Server1. What should you do first?（）

单项选择题 You run a Windows 2012 R2 Hyper-V Role Server, you need to shrink the size of files.vhd. Which PowerShell cmdlet option you should run first?（）