1
GATE CSE 1994
MCQ (Single Correct Answer)
+2
-0.6
Which of the following features cannot be captured by context-free grammars?
A
Syntax of if-then-else statements
B
Syntax of recursive procedures
C
Whether a variable has been declared before its use
D
Variable names of arbitrary length
2
GATE CSE 1992
MCQ (More than One Correct Answer)
+2
-0
Context-free languages are
A
closed under union
B
closed under complementation
C
closed under intersection
D
closed under Kleene closure.
3
GATE CSE 1989
MCQ (More than One Correct Answer)
+2
-0
Context free languages and regular languages are both closed under the operation(s) of :
A
Union
B
Intersection
C
Concatenation
D
Complementation
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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