Introduction to Linux I

Introduction to Linux I Chapter 8 Exam Answer 2016

1. Which regular expression character matches any one character?

  • .
  • ?
  • +
  • *

2. Which regular expression character matches zero or more of the previous character?

  • ?
  • +
  • *
  • .

3. Which regular expression character matches one or more of the previous character?

  • $
  • *
  • +

4. Which of the following regular expression characters is an extended regular expression character?

  • +
  • .
  • $
  • *

5. What does “|” do in a regular expression?

  • Redirects input to the command
  • Redirects output from the command
  • Separates repetition modifiers
  • Separates alternative patterns that can be matches

6. The regular expression a? is equivalent to:

  • a{0,1}
  • a{1}
  • a{1,}
  • a{0,}

7. The regular expression a* is equivalent to:

  • a{0,1}
  • a{1,}
  • a{0,}
  • a{1}

8. The regular expression a+ is equivalent to:

  • a{1}
  • a{1,}
  • a{0,}
  • a{0,1}

9. To use extended regular expressions, you can use:. (choose two)

  • grep -e
  • fgrep
  • egrep
  • grep -E

10. To use regular expression characters to match themselves, you cannot:

  • Put the character in the square brackets
  • Use the fgrep command
  • Use the slash in front of the character
  • Use the backslash in front of the character

11. What is NOT a purpose of using parentheses around parts of a regular expression?

  • They can be used to make alternation more efficient
  • They can be used to refer back to what was matched
  • They can be used to group characters for repetition
  • They can be used to change the order that the pattern is evaluating

12. Which option for grep will invert the pattern matching results?

  • -i
  • -v
  • -r
  • -o

13. If you want to use grep without regard to the capitalization of text, you can use the option:

  • -t
  • -v
  • -i
  • -r

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Gatsy

Da#3l&l9;altra è alle prese con crisi economica e riforma sanitaria, quindi i soldi dovrà pure trovarli da qualche parte, e cosa di meglio di un bel taglio alla NASA?Come ho già detto , se si vuole risparmiare un po' di soldi, non è la NASA il punto migliore dove tagliare. La spesa militare USA è 30 volte maggiore…

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