ISRO CS-2023

Grammars that parse the input from left to right, produce a rightmost derivation, with a lookahead of 1 symbol.

Grammars that parse the input from left to right, produce a leftmost derivation, with a lookahead of 1 symbol.
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Grammars that parse the input from left to right, and backtrack at most once.

Grammars that parse the input from right to left, produce a leftmost derivation, and backtrack at most once.