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Unix

Unix
Which of the following set options is used with vi editor to ignore case while searching for patterns?

ts
ic
ai
sm

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Unix
Which command is used to delete all files in the current directory as well as all files and sub-directories in its subdirectories?

rm *.*
rm all
rm *
rm -r *
None of these

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Unix
Which command is used with vi editor to search a pattern in the forward direction?

??
?
/
//

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Unix
The UNIX file system stores a date in physical blocks of

None of these
1024 bytes
2048 bytes
512 bytes
256 bytes

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Unix
The Octal number to be given alogn with chmod command to make a file readable, writable and executable to the owner, readable and executable to group and others is:

744
555
755

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

$#
$*
$!
$0

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