Homework Answers
| Regular Expression | String, length 5 which matches | String, length 5 which does NOT match |
| 0*((0|1|2) *|(22) *) * |
• 00000 • 011222 • 121212 |
Impossible. All possible 5 length string is generated |
| (0|2) *1(2|0) * |
•00100 •20120 |
• 20121 11201 |
| 0(1|2) *0 |
• 01210 •02220 |
•11111 •00011 |
| 01(0*) (2101) * |
• 01000 This is the only possible string of length 5 |
•02101 |
In first question 0*((0|1|2) *|(22) ) * -> This language
produces all string possible of all length. Thus it has language of
*. Produces all possible string.
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