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Which of the following can be a LALR parser generator?

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in Automata Theory by (51.1k points)
Which of the following can be a LALR parser generator?

(a) YACC

(b) GNU Bison

(c) YACC and GNU Bison

(d) None of the mentioned

I got this question during an interview for a job.

My enquiry is from Applications in section Context Free Grammars and Languages of Automata Theory

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The correct choice is (c) YACC and GNU Bison

The best I can explain: YACC is a computer code for UNIX operating system which generates a LALR parser. On the other hand GNU Bison or Bison can generate LALR and GLR parsers.

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