Consider the productions $A → PQ$ and $A → XY$. Each of the five…

GATE · 2020 · CS · Computer Science & IT

Consider the productions $A → PQ$ and $A → XY$ . Each of the five non-terminals $A,P,Q,X$ , and $Y$ has two attributes: $s$ is a synthesized attribute, and $i$ is an inherited attribute. Consider the following rules.

Rule 1 : $P . i = A.i + 2, \: Q.i = P. i + A.i,$ and $A.s = P.s +Q. s$

Rule 2 : $X.i = A.i + Y.s$ , and $Y. i = X. s +A .i$

Which one of the following is TRUE ?

A.
Both Rule 1 and Rule 2 are $L - attributed$
B.
Only Rule 1 is $L - attributed$
C.
Only Rule 2 is $L - attributed$
D.
Neither Rule 1 nor Rule 2 is $L - attributed$

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Consider the productions \(A → PQ\) and \(A → XY\). Each of the five…