1
GATE CSE 2000
+1
-0.3
Let $$L$$ denote the language generated by the grammar $$S \to 0S\left. 0 \right|00.$$ Which one of the following is true?
A
$$L = {0^ + }$$
B
$$L$$ is regular but not $${0^ + }$$
C
$$L$$ is context free but not regular
D
$$L$$ is not context free
2
GATE CSE 1999
+1
-0.3
Consider the regular expression $$(0+1)(0+1).......n$$ times. The minimum state finite automation that recognizes the language represented by this regular expression contains:
A
$$n$$ states
B
$$n+1$$ states
C
$$n+2$$ states
D
None of the above
3
GATE CSE 1998
+1
-0.3
If the regular set $$A$$ is represented by $$A = {\left( {01 + 1} \right)^ * }$$ and the regular set $$'B'$$ is represented by $$B = \left( {{{\left( {01} \right)}^ * }{1^ * }} \right),$$ which of the following is true?
A
$$A \subset B$$
B
$$B \subset A$$
C
$$A$$ and $$B$$ are incomparable
D
$$A=B$$
4
GATE CSE 1998
+1
-0.3
Which of the following sets can be recognized by a Deterministic Finite-state Automation?
A
The numbers $$1, 2, 4, 8,$$ ...... $${2^n},$$ ............. written in binary.
B
The numbers $$1, 2, 4, .....$$ $${2^n},$$ $$.....$$ written in unary.
C
The set of binary strings in which the numbers of zeros is the same as the numbers of ones.
D
The set $$\left\{ {1,101,11011,1110111,...} \right\}.$$
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