Unix
The command which transcribes the standard input to the standard output and also makes a copy of the same in a file is

grep
tr
tee
sort

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Unix
Which of the following commands is used to remove files with confirmation prompt from the user file system which have neither been accessed nor modified i the last one year?

find /user/* (-mtime + 365 - a - atime +365 ) - OK rm {} ;
grep (/usr/*) - mtime + 365 | -ok rm
find -mtime +365 | rm
find -name - mtime + 365 / - ok rm
None of these

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Unix
The special shell variable $* is used

to list the positional parameters
to exit status of ast command executed.
None of these
to process number of the current shell
to name the command being executed

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