1
GATE CSE 2009
MCQ (Single Correct Answer)
+1
-0.3
Which one of the following languages over the alphabet $$\left\{ {0,\left. 1 \right)} \right.$$ is described by the regular expression $${\left( {0 + 1} \right)^ * }0{\left( {0 + 1} \right)^ * }0{\left( {0 + 1} \right)^ * }$$
A
The set of all strings containing the substring $$00$$
B
The set of all strings containing at most two $$0’$$s
C
The set of all strings containing at least two $$0’$$s
D
The set of all strings that begin and end with either $$0$$ or $$1$$
2
GATE CSE 2009
MCQ (Single Correct Answer)
+2
-0.6
$$L = {L_1} \cap {L_2}$$ where $${L_1}$$ and $${L_2}$$ are languages defined as follows.
$${L_1} = \left\{ {{a^m}{b^m}\,c\,{a^n}{b^n}\left| {m,n \ge 0} \right.} \right\}$$
$${L_2} = \left\{ {{a^i}{b^i}{c^k}\left| {i,j,k \ge 0} \right.} \right\}$$ Then $$L$$ is
A
Not recursive
B
Regular
C
Context free but not regular
D
Recursively enumerable but not context free
3
GATE CSE 2009
MCQ (Single Correct Answer)
+2
-0.6
GATE CSE 2009 Theory of Computation - Finite Automata and Regular Language Question 39 English

The above $$DFA$$ accepts the set of all strings over $$\left\{ {0,\,\,1} \right\}$$ that

A
Begin either with $$0$$ or $$1$$
B
End with $$0$$
C
End with $$00.$$
D
Contain the substring $$00.$$
4
GATE CSE 2009
MCQ (Single Correct Answer)
+1
-0.3
Which one of the following is FALSE?
A
There is a unique minimal $$DFA$$ for every regular language
B
Every $$NFA$$ can be converted to an equivalent $$PDA$$
C
Complement of every context free language is recursive
D
Every non deterministic $$PDA$$ can be converted to an equivalent deterministic $$PDA$$
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