Which of the following derivations does a top-down parser use while parsing an input string?(a) Leftmost derivation(b) Leftmost derivation in reverse(c) Rightmost derivation(d) Rightmost derivation in reverse

Which of the following derivations does a top-down parser use while pa

1.	Which of the following derivations does a top-down parser use while parsing an input string?(a) Leftmost derivation(b) Leftmost derivation in reverse(c) Rightmost derivation(d) Rightmost derivation in reverse
Answer» Right option is (a) Leftmost derivation The best explanation: In top down parser takes input from Left to right constructing leftmost derivation of the sentence.

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Which of the following derivations does a top-down parser use while parsing an input string?(a) Leftmost derivation(b) Leftmost derivation in reverse(c) Rightmost derivation(d) Rightmost derivation in reverse

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