Which of the following commands can an operator use to view disk performance details?（）

单项选择题An operator is editing a file using vi. Which of the following subcommand sequences will copy the current line plus the next 2 lines to the end of the file?（）

A. yy E 3p
B. 3yy G p
C. 3yy :e 5pp
D. yy :g 3p

单项选择题How can an operator temporarily gain access to the command line while in a smit session, without losing the current smit session?（）

A. F2 key
B. F6 key
C. F8 key
D. F9 key

单项选择题Which of the following commands will display, in MB, the total, used, and free blocks of the currently mounted filesystems?（）

A. df -m
B. du -m
C. df -vm
D. du -vm

单项选择题Which of the following is a correct statement about how the user environment is configured at login?（）

A. If present, the settings in the $HOME/.profile file will override the settings in the /etc/profile file.
B. If both $HOME/.profile and $HOME/.env files are present, the settings in the $HOME/.profile file will take precedence.
C. The settings in the /etc/environment file are system-wide and will override user customized settings in the $HOME/.profile.
D. The settings in the /etc/profile file will override settings in the $HOME/.profile file unless the $LOCAL_PROFILE variable is set to 'true'.

单项选择题What command will allow the operator to add the current working directory to the command search path?（）

A. export PATH=pwd
B. export PATH=$PWD
C. export PATH=$PATH:pwd
D. export PATH=$PATH:$PWD