单项选择题 Which of the following is true when Bob, a technician, is setting default security permissions on a folder?（）

单项选择题 It is a company’s policy to shut down all workstations at the end of the day. However, the majority of employees are leaving disks in their workstations and upon start up the next morning they are receiving a ‘NTLDR is missing’ error. Which of the following is a possible solution?（）

单项选择题 A user reports that after configuring the BIOS to boot to the hard drive first, the system still tries to boot from the optical drive. Which of the following is the MOST likely cause?（）