单项选择题
A. Set the group’s folder permissions to deny.
B. Use Event Viewer to monitor changes to the file.
C. Store a backup copy of the file on a USB drive.
D. Change the file attribute to read only.
单项选择题 A user installed a Blu-Ray drive in their PC. The user reports that the new drive and their existing DVD-RW drive are not operating. Which of the following needs to be replaced?（）
单项选择题 A customer requires a shock resistant mass storage device in their PC. Which of the following drives should the technician install?（）
单项选择题 A technician is attempting to use a command line prompt to continuously ping a remote server to check availability and reliability of the connection. Which of the following provides the ping command needed to continuously ping the system?（）