Which of the following derivations does a top-down parser use while parsing an input string? The input is assumed to be scanned in left to right order.
(A)
Leftmost derivation
(B)
Leftmost derivation traced out in reverse
(C)
Rightmost derivation
(D)
Rightmost derivation traced out in reverse
Answer: (A)
Explanation:
See question 1 of http://www.geeksforgeeks.org/compilers-set-1/
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