Unix
Which of the following commands is used to copy a file wb from the programs directory into a file called wbx in the misc directory?

tar programs/wb misc/wbx
copy a:programs/wb b:misc/wbx
cp programs/wb misc/wbx
copy programs/wb misc/wbx

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Unix
The special shell variable $* is used

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

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