1
GATE CSE 1992
MCQ (More than One Correct Answer)
+2
-0.6
Context-free languages are
A
closed under union
B
closed under complementation
C
closed under intersection
D
closed under Kleene closure.
2
GATE CSE 1989
MCQ (More than One Correct Answer)
+2
-0.6
Context free languages and regular languages are both closed under the operation(s) of :
A
Union
B
Intersection
C
Concatenation
D
Complementation
3
GATE CSE 1987
MCQ (Single Correct Answer)
+2
-0.6
A context-free grammar is ambiguous if:
A
The grammar contains useless non-terminals.
B
It produces more than one parse tree for some sentence.
C
Some production has two non-terminals side by side on the right-hand side.
D
None of the above.
4
GATE CSE 1987
MCQ (Single Correct Answer)
+2
-0.6
FORTRAN is:
A
Regular language.
B
Context free language.
C
Context sensitive language.
D
None-of the above.
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