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Which of the following conversion is not possible (algorithmically)?

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Which of the following conversion is not possible (algorithmically)?

(a) Regular grammar to CFG

(b) NDFA to DFA

(c) NDPDA to DPDA

(d) NDTM to DTM

I got this question during an online exam.

The doubt is from Context Free Grammar topic in portion Contextfree Grammar and Syntax Analysis of Compiler

1 Answer

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Best answer
Right choice is (c) NDPDA to DPDA

The explanation is: Not every NDPDA has an equivalent deterministic PDA.

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