单项选择题 A company uses an application that creates temp files that need to be backed up on a daily basis. A test restore fails to restore the temp files. In checking the backup catalog, Karen, a technician, discovers that the temp files are not being backed up. Which of the following is the MOST likely reason?（）

单项选择题 During the startup of a Windows XP Professional workstation, a message appears stating a service failed to start. Which of the following administrative areas will show what service failed?（）

单项选择题 Multiple users have reported not being able to print to a network printer. Which of the followingcommands will test the network connectivity status of the printer?（）