Unix
Which of the following shell's wildcards are used to match any number of characters including none?

None of these
[ijk]
[!ijk]
?
*

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Unix
The % key allows you

to move the cursor backward to the beginning of a word
to move the cursor to a matching delimiter, when a delimiters a parenthesis, a bracket, or a brace.
to move the cursor to the upperleft corner of the screen
to move the cursor to the first column in the current line

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Unix
The cp command uses:

standard input file
neither standard input nor standard output file
both input and output file
standard output file

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