Choose match(es) for each given basic/extended regular expression (maybe multipl
ID: 3886607 • Letter: C
Question
Choose match(es) for each given basic/extended regular expression (maybe multiple correct matches) and describe the pattern of matched string for 3), 4), 5), 6), 11).
5) ‘[a-z] (+[a-z])+’
(a) a+b+c (b) +b (c) x (d) x+1 (e) x+a
6) ‘a.[bc]+’
(a)azbc (b)az (c)azbcbc (d)acc (e)acz
7) ‘a.[0-9]’
(a)azz (b)a0z (c)a01 (d)a0a (e)aza
8) ‘[a-z]+[.?!]’
(a)good! (b)Book. (c)hard? (d)cool?hot (e)nothing
9) ‘[a-z]+[.?!]s*[A-Z]’ (hint: s matches any whitespace characters)
(a)Grade. A (b) book. Z (c) E. G (d) Level. a (e)index?a
10) ‘(very )+(cool )?(good|bad) weather’
(a)good weather (b) very good weather (c) cool weather
(d) very cool bad weather (e)cool good weather
11) ‘-?[0-9]+’
(a)3312 (b) -2231 (c) +32 (d) 0.5 (e)2/3
12) ‘-?[0-9]*.?[0-9]*’
(a)3312 (b) -2231 (c) +32 (d) 0.5 (e)2/3
Explanation / Answer
Ans:
5) (a) a+b+c and (e) x+a
6) (a)azbc , (c)azbcbc and (d)acc
7) (c)a01
8) (a)good! and (c)hard?
9) (b) book. Z
10. (b) very good weather
11. (a)3312 and (b) -223
12. No match