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https://gateoverflow.in/311001/deletion-of-useless-symbols-from-a-grammar-self-doubt

 

In the above question aren’t we supposed to delete the production A → b because at the end after removing the useless symbols, A is unreachable from the start symbol S.

So, wont be the answer S → a only after removing useless symbols ?

in Theory of Computation by (1.6k points)
edited by | 14 views
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Yes you are correct.
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my id is not being taken even after uploading less than 2 MB size document, so I cant comment there.

what ?

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It's now resolved. It ws not taking a png format file of less dan 2 MB. So after several tries, a jpeg was taken.

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