Unix
If you are to use [Control-c] as the interrupt key instead of [Del], then you will have to use

stty intr ^c
stty echoe
tty ^c
stty echo ^a

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Unix
The ls -l command tells

the name of the group owner of the file
None of these
who the owner of the file is
All of these
how large the file is and when the file was last modified.

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