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單項選擇題

What must you type to enter operational mode from the root@% command prompt?（）

A. exit
B. configure
C. edit
D. cli

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單項選擇題

When using keyboard shortcuts, which keystroke combination allows users to erase a single word to the left of the cursor?（）

A. Ctrl + a
B. Ctrl + e
C. Ctrl + u
D. Ctrl + w

單項選擇題

When using keyboard shortcuts, which single keystroke combination allows users to erase the entire current command?（）

A. Ctrl + a
B. Ctrl + e
C. Ctrl + u
D. Ctrl + w