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GATE | GATE CS 1996 | Question 35
The grammar whose productions are
<stmt> → if id then <stmt> <stmt> → if id then <stmt> else <stmt> <stmt> → id := idis ambiguous because a) the sentence if a then if b then c:= d has two parse trees b) the left most and right most derivations of the sentence if a then if b then c:= d give rise to different parse trees c) the sentence if a then if b then c:= d else c:= f has more than two parse trees d) the sentence if a then if b then c:= d else c:= f has two parse trees
(A)
a
(B)
b
(C)
c
(D)
d
Answer
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