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asked in Compiler Design by Active (4.9k points)
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is it B?
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Yes..please explain how?
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The prefixes of right sentential forms that can appear on the stack of a shift-reduce parser are called viable prefixes.By definition, a viable prefix is a prefix of a right sentential form that does not continue past the right end of the rightmost handle of that sentential form.

Out of all strings generated by this grammer having a's at the start this is the shortest,

reference http://cse.iitkgp.ac.in/~bivasm/notes/scribe/11CS30001.pdf

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why not d?

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answered by Active (3.6k points)
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Why not d?

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