单项选择题
A user reports that the computer’s hard drive is constantly running and the hard drive light is constantly flashing. Which of the following tools would be used to resolve this issue without losing data?（）
A.chkdsk
B.fdisk
C.defrag
D.format
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单项选择题
Which of the following ping commands would a technician use to ping continuously?（）
A.PING -l
B.PING -R
C.PING -t
D.PING -a -
单项选择题
A technician is attempting to remove a number of viruses from an infected system. The antivirus software in use is fully updated and has detected the viruses. However, a message stating that the file is in use appears when the technician tries to quarantine or delete the infected files. Which of the following can be done to resolve this issue?（）
A. Change the permissions on the file.
B. End the running process.
C. Run the antivirus scan again.
D. Use the command line to delete the file. -
单项选择题
Which of the following tools can be used to securely connect to a remote system?（）
A.RCMD
B.SSH
C.TELNET
D.HTTP
