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Which of the following statements is false?

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in Compiler by (36.6k points)
Which of the following statements is false?

(a) Left as well as right most derivations can be in Unambiguous grammar

(b) An LL (1) parser is a top-down parser

(c) LALR is more powerful than SLR

(d) Ambiguous grammar can’t be LR (k)

I had been asked this question in exam.

The question is from Top-Down Parsing in section Topdown Parsing of Compiler

1 Answer

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The correct answer is (a) Left as well as right most derivations can be in Unambiguous grammar

To elaborate: If a grammar has more than one leftmost (or rightmost) derivation the grammar is ambiguous. Sometimes in unambiguous grammar the rightmost derivation and leftmost derivations may differ.

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