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Unix

Unix
Which of the following special shell variables is used to process number of the last background job?

$#
$!
$0
$*

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Unix
Which command is used with file named 'note' to remove the executable permission from the user and assign read permission to the group and others?

chmod go+x, u-x note
chmod u-x, go+r note
chmod g-x, uo+r note
chmod go+r, u+x note
None of these

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Unix
Which column contains all details of the permissions of a file when you issue the ls -l command?

third
first
fourth
second

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

ps
du
au
pid

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Unix
The cat command is used to

print a file
display a file
None of these
copy a file
capture a file

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Unix
Which command is used to display a file contents in octal form?

of
oct
od
cd

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