Gate2020 cs Q42

42Consider 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?

Option : C
Explanation :
Rule 1: Rule 1: It is Rule 1: L-attributed by definition.
Rule 2: Rule 2: It is not L-attributed because this expression (X. Rule 2: i = A.i + Y.s) fails to satisfy the definition of L-attributed.

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