单项选择题 You are the administrator of a Windows 2000 Professional computer. A user named Maria assists you in performing some administrative tasks. Maria is a member of local Administrators group. Users report that Maria has been viewing and changing their files.  You want Maria to be able to install programs, perform backups and manage printers, but not to view, change or read other users’ files for which permission has not been granted. You want to set up Maria’s account to have minimal rights and permission. You want to accomplish this with least amount of administrative effort.  What should you do?  （）

单项选择题 You encrypt your files to ensure the security of the files. You want to make a backup copy of the files and maintain their security settings. You have the option of backing up to either the network or floppy disk.  What should you do？（）

单项选择题 You are the administrator of your company’s network. The software department is preparing to rewrite an accounting application so that it will run on Windows 2000 Professional computers. All of the computers in the software department currently use Windows 98.  You want to configure the computers in the software department so that the users can use both Windows 98 and Windows 2000 Professional during the project. You also want to ensure that the computers are configured for optimal disk performance. In addition you want to ensure that users in the software department can access all of the files on their computers by using either operating system.  What should you do? （）