RegExp and DFA for strings having triple a’s or triple b’s

By Prof. Fazal Rehman Shamil
Last modified on April 14th, 2021

RegExp and DFA for strings having triple a’s or triple b’s”. Also,draw FA(finite automata) for that condition.                    .           .

RegExp for strings having triple a’s or triple b’s

(a+b)*(aaa+bbb) (a+b)*

RegExp for strings having consecutive triple a’s or triple b’s

(aaa+bbb)*

Finite Automata Exercise Solution

Here I am showing you a list of some more important Deterministic Finite Automata used in the theory of automata and theory of computation.

  1. DFA for  (a+b)* (a+b)a .
  2. DFA for (bb)*(aa)* .
  3. DFA for  b+a(a+b)*+a.
  4. DFA for (a+b)*b+(bb)*a.
  5. DFA for bb+a(a+b)*+aa.
  6. DFA for  a(a+b)*+bb(a)* .
  7. DFA for  a(a+b)b*+bb(a)*.
  8. DFA for  b(aa)*a+a(bb)*b.
  9. DFA for a+a(aa+b)*(aa)b.
  10. DFA for a+a(aa+b)*+(aa)b.
  11. DFA for (a+b)b(a+b)*+(aa)*b.
  12. FA for strings starting with a and ending with a.
  13. FA for the language of all those strings starting with a.
  14. FA for the language of all those strings containing aa as a substring.
  15. DFA for the language of all those strings starting and ending with the same letters.
  16. DFA for the language of all those strings starting and ending with different letters.
  17. DFA for the language of all those strings having double 0 or double 1.
  18. DFA for the language of all those strings starting and ending with b.
  19. DFA for ending with b.
  20. DFA for the string of even A’s and even b’s.
  21. DFA for the regular expression of  a(a+b)*+(bb)+a(ba)*+aba+bb*(a+b)*.
  22. RegExp and DFA for strings having triple a’s or triple b’s.
Prof.Fazal Rehman Shamil (Available for Professional Discussions)
1. Message on Facebook page for discussions,
2. Video lectures on Youtube
3. Email is only for Advertisement/business enquiries.