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Unix

Unix
Which of the following is invalid filename?

trial
TRY
None of these
my .file

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Unix
The field separator in cut command is specified with

-c
None of these
#NAME?
-r option

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Unix
Which of the following commands is used to identify the type of file by context?

ls
file
more
cat

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Unix
Which of the following command is used to count just the number of lines contained in a file?

wc -c
wc -r
None of these
wc -w
wc -l

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Unix
Which of the following commands is used to have a two-way communication with any person who is currently logged in?

mail
grep
mesg
write
None of these

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Unix
Which command is used to display the characteristics of a process?

pid
du
ps
au

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