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).
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).
1) a[ab]*a (a)ababa (b) aaba (c) aabab (c) aabab (d) aabbaa (e)aa
2) a(bc)? (a) abc (b) a(bc)? (c) a(bc (d) a (e) abcbc
3) .[ind]* (a) wind (b) window (c) end (d) good (e)will
4) [a-z]+[a-z] (a) a+b+c (b) +b (c) x (d) x+1 (e) x+a
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
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