Question: What does the following regular expression match? [ -~] Note that there is a SPACE after [ Your answer: Hint: you may need to refer

  1. What does the following regular expression match?

[ -~] Note that there is a SPACE after [

Your answer:

Hint: you may need to refer to the ASCII table when working on this question.

  1. What does this command do?

sed 's/black/white/' new

Your answer:

  1. What does the following command do and how does it work?

sed -e 's/<[^>]*>//g' file

Your answer:

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