- Computer Science Engineering (CSE)
- Theory of Computation
- Unit 1
- The regular expression 0*(10)* denotes t...

Q. |
## The regular expression 0*(10)* denotes the same set as |

A. | (1*0)*1* |

B. | 0+(0+10)* |

C. | (0+1)*10(0+1)* |

D. | None of the above |

Answer» B. 0+(0+10)* |

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Theory of Computation

- A language is represented by a regular expression (a)*(a + ba). Which of the following strings does not belong to the regular set represented by the above expression?
- Let P be a regular language and Q be context-free language such that Q ∈ P. (For example, let P be the language represented by the regular expression p*q* and Q be {pnqn n∈ N}). Then which of the following is ALWAYS regular?
- Regular expression (x/y)(x/y) denotes the set
- Which of the following are decidable? 1) Whether the intersection of two regular language is infinite. 2) Whether a given context free language is regular. 3) Whether two push down automata accept the same language. 4) Whether a given grammar is context free.
- Let L={w (0 + 1)* w has even number of 1s}, i.e. L is the set of all bit strings with even number of 1s. Which one of the regular expression below represents L?
- Languages are proved to be regular or non regular using pumping lemma.
- Automaton accepting the regular expression of any number of a ' s is:
- Which of the following is not a regular expression?
- How many strings of length less than 4 contains the language described by the regular expression (x+y)*y(a+ab)*?
- Which one of the following languages over the alphabet {0,1} is described by the regular expression: (0+1)*0(0+1)*0(0+1)*?

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