Ch8 Regular Expressions Exam

Last Updated on October 23, 2022 by InfraExam

Ch8 Regular Expressions Exam

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

   • -v
   • -r
   • -t
   • -i

2. The regular expression a? is equivalent to:

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

3. The regular expression a* is equivalent to:

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

4. The regular expression a+ is equivalent to:

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

5. To get the grep command to show the names of files that matched instead of the content that matched, you can use the option:

   • -l
   • -n
   • -q
   • -f

6. To use extended regular expressions, you can use:

   (choose two)

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

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

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

8. What does the vertical bar | character do in a regular expression?

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

9. What is not a purpose of using parentheses around parts of a regular expression?

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

10. What is the reason you would use the grep command with a quiet -q option?

    • You do not want to write anything to standard output
    • You don’t want grep to make noise
    • You want the output to be redirected to a file
    • You want the output to be small

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

    • *
    • $
    • .
    • +

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

    • -o
    • -v
    • -r
    • -i

13. Which regular expression character matches any one character?

    • *
    • .
    • ?
    • +

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

    • –
    • *
    • $
    • +

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

    • .
    • +
    • ?
    • *