单项选择题
Which of the following percentages is required for Disk Defragmenter to fully defragment thevolume?（）
A.5%
B.15%
C.25%
D.50%
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A technician is working on a PC that may have malware. Which of the following should thetechnician try FIRST?（）
A. Educate the end user about how a computer becomes infected.
B. Perform a clean install of the OS.
C. Boot the PC in Safe Mode.
D. Quarantine all infected files. -
单项选择题
Which of the following errors are caused by leaving a floppy disk in the drive when a computer is powered on?（）
A. Random bluescreen error
B. Inaccessible boot drive
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单项选择题
Which of the following is the BEST way to prevent social engineering tactics?（）
A. End user training
B. Antivirus software
C. Group policy
D. Encryption
