Given the regular expression, circle (do NOT bold) all the matching patterns.

1. [ABC][^AB]
a. A
b. AB
c. ADBC
d. D
e. none

2. ^[ABC][AB]$
a. A
b. AB
c. ADBC
d. D
e. none

3. ^[ABC][^AB]$
a. A
b. AB
c. ADBC
d. D
e. none

4. bc.*
a. aaabbbcccddd
b. aaaabcsssss
c. aaaabc
d. aabbss
e. none

5. bc*.
a. aaabbbcccddd
b. aaaabcsssss
c. aaaabc
d. aabbss
e. none

6. ^[a-z]…
a. abcdefg
b. a:237efg
c. AbcDefg
d. afe
e. none

7. \..\{3\}$
a. rs.ef$tt
b. abc.ab
c. abc.$$$$
d. abc
e. none

8. s:?s*
a. efgs:sgfe
b. ssssssssss
c. rsts
d. abc
e. none

9. :?.?
a. :a?????????
b. eeeeeefffff?hhhh
c. aaa::??????
d. :?.\?
e. none

10. [^\$]$
a. $$$$$$aaaaaa
b. bcdef$
c. $
d. abc
e. none

11. ^[^\$]*$
a. $$$$$$aaaaaa
b. bcdef$
c. $
d. abc
e. none

12. ^[^\$]$
a. $$$$$$aaaaaa
b. bcdef$
c. $
d. abc
e. none

13. \$[0-9]$
a. $$$$$$
b. $10
c. abc$
d. $
e. none

14. ^\$[0-9][0-9]$
a. $10
b. abc$
c. $
d. none

1. Write a regular expression that matches a blank line.
2. Write a regular expression that matches a nonblank line.
3. Write a regular expression that matches every line.
4. Write a regular expression that matches lines that only contain a number between 20 and 29 (inclusive).

Readings: UNIX and Shell Programming (Gilberg, Richard and Forouzan, Behrouz, 2003)

Given the regular expression, circle (do NOT bold) all the matching...