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Consider the grammar which is $not$ $LL(1)$ as the $LL(1)$ table contain multiple error entries for the same

The number of entries have multiple production in LL1 are?

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$2$ ?
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yup

please explain
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The multiple entries here will be due to the $S\rightarrow\epsilon$

$First(S) = {a,b}$ - so the respective productions go in those cells.

$Follow(S)$ includes \$, and also Follows of A and B. i.e. $Follow(S) = {$, a, b}$ ,and so $S\rightarrow\epsilon$ goes into all these cells.

With this you can conclude that the cells corresponding to $S, a$ and $S, b$ will have multiple entries.
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