Linux+ V7 Regular Expressions & Text Processing

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3. Which regex metacharacter represents any single character except newline?

*

^

.

$

4. In sed, what does the 'p' command do?

Prints specified lines

Pauses execution

Appends text

Substitutes patterns

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6. What does grep -c do?

Displays context around matches

Counts matching lines

Ignores case sensitivity

Shows only filenames

7. Which command combines grep and sed functionality for advanced text manipulation?

Cut

Tr

Perl

Paste

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9. What does the regex '+' quantifier mean?

Zero or one occurrence

One or more occurrences

Zero or more occurrences

Exactly two occurrences

10. Which sed option makes changes in-place to a file?

-n

-e

-i

-p

11. What does the regex pattern '^[0-9]{3}-[0-9]{2}-[0-9]{4}$' match?

A phone number in format XXX-XXX-XXXX

A Social Security number in format XXX-XX-XXXX

An IP address

A date in MM-DD-YYYY format

12. In awk, how do you print the third field of each line?

Awk '{print $3}'

Awk '{print NF3}'

Awk 'NR==3'

Awk '{print FS3}'

13. What does the regex character class '[^a-z]' match?

Any lowercase letter

Any character except lowercase letters

The literal caret symbol

Any uppercase letter

14. Which grep option prints only the filename containing matches?

-c

-l

-n

-h

Submit

16. What does the regex pattern '\bword\b' match?

The word anywhere in a line

The word as a whole word only

Multiple occurrences of word

Word at the beginning of a line

17. Which awk built-in variable contains the number of fields in the current record?

NR

NF

FS

RS

18. What regex metacharacter matches zero or more of the preceding element?

+

?

*

|

19. In sed, what does the 's/old/new/g' command accomplish?

Substitutes first occurrence of old with new

Globally substitutes all occurrences of old with new

Searches for old and prints matching lines

Deletes all lines containing old

20. Which grep option enables extended regular expressions?

-i

-E

-v

-l

Linux+ V7 Regular Expressions and Text Processing Quiz

1. The regex pattern '(foo|bar)' matches ____.

2.

What first name or nickname would you like us to use?

2. In awk, 'NR' represents the ____.

3. Which regex metacharacter represents any single character except newline?

4. In sed, what does the 'p' command do?

5. The regex pattern '^$' matches ____.

6. What does grep -c do?

7. Which command combines grep and sed functionality for advanced text manipulation?

8. In awk, the 'BEGIN' block executes ____.

9. What does the regex '+' quantifier mean?

10. Which sed option makes changes in-place to a file?

11. What does the regex pattern '^[0-9]{3}-[0-9]{2}-[0-9]{4}$' match?

12. In awk, how do you print the third field of each line?

13. What does the regex character class '[^a-z]' match?

14. Which grep option prints only the filename containing matches?

15. In sed, the 'd' command ____.

16. What does the regex pattern '\bword\b' match?

17. Which awk built-in variable contains the number of fields in the current record?

18. What regex metacharacter matches zero or more of the preceding element?

19. In sed, what does the 's/old/new/g' command accomplish?

20. Which grep option enables extended regular expressions?