Search text using regular expressions

Question 1

What are the two forms of regular expression?

Answer 1

Basic and extended

Question 2

Describe a bracket expression?

Answer 2

Any character in the square brackets is matched on

Question 3

Describe a range expression?

Answer 3

Any character in the range of characters is the square brackets is matched on

Question 4

What regex character represent any single character?

Answer 4

.

Question 5

What regex character represents the start of a line?

Question 6

What regex character represents the end of a line?

Answer 6

$

Question 7

How are multiple possible strings defined?

Answer 7

|

Question 8

What are used to separate subexpressions?

Answer 8

( )

Question 9

What is the escape character?

Answer 9

\

Question 10

What command will search files for a specified string?

Answer 10

grep

Question 11

What command is the equivalent of grep -E (extended) ?

Answer 11

egrep

Question 12

What command is the equivalent of grep -F (fixed strings) ?

Answer 12

fgrep

Question 13

What type of grep would be best suited to search for user mark.reed?

Answer 13

fgrep - fixed

Question 14

What type of grep would be best suited to search for a mix of possible matches?

Answer 14

egrep - extended

Question 15

In which grep mode do the meta-characters ?, +, {, |, (, and ) lose their special meaning?

Answer 15

regular

Question 16

Regex which character - the preceding item is optional and matched at most once?

Answer 16

?

Question 17

Regex which character - the preceding item will be matched zero or more times?

Answer 17

*

Question 18

Regex which character - the preceding item will be matched one or more times?

Answer 18

+

Question 19

What should be used for filtering and transforming text?

Answer 19

sed

Question 20

What sed switch will make a change to a file without outputing the result to stdout?

Answer 20

-i –in-place

Question 21

What letter in sed will replace the first occurance on a line?

Answer 21

s (substitute)

Question 22

What letter when used after the expression will change every occurance of a string?

Answer 22

g (global)

Question 23

What letter when used after the expression will write the output to a file?

Answer 23

w (write)