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Syntax Directed Definition and Translations MCQs | Page 4 of 12
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S > ER
R > * E{print{โ * โ);
R | f
E > F + E{print(โ + โ); | F F > (S) | id{print(id.value);}
Here id is a taken that represents an integer and id, value represents the corresponding integer value. For an input โ2 * 3 + 4โ, this translation scheme prints
for if i # i } } }
Which one to the following false?
E E .val E .VAL E .val
E # E E .val E .VAL E .val
;
The above grammar and the semantic rules are fed to a yacc tool (which is an LALR (1) parser generator) for parsing and evaluating arithmetic expressions. Which one of the following is true about the action of yacc for the given grammar?
E E .val E .VAL E .val
E # E E .val E .VAL E .val
;
Assume the conflicts part (a) of this question are resolved and an LALR (1) parser is generated for parsing arithmetic expressions as per the given grammar.
Consider an expression 3 # 2 + 1. What precedence and associativity properties does the generated parser realize?
S -> S * E
S -> E
E -> F + E
E -> F
F -> id
Consider the following LR (0) items corresponding to the grammar above.
(i) S -> S * .E
(ii) E -> F. + E
(iii) E โF + .E
Given the items above, which two of them will appear in the same set in the canonical sets-of-items for the grammar?
S -> FR
R -> * S | ฮต
F -> id
In the predictive parser table, M, of the grammar the entries M [S, id] and M [R, $] respectively
S -> ER
R -> * E{print{โ * โ);
R | f
E -> F + E{print(โ + โ); | F
F -> (S) | id{print(id.value);}
Here id is a taken that represents an integer and id. value represents the corresponding integer value. For an input โ2 * 3 + 4โ, this translation scheme prints
for for if i # i } } }
Which one to the following false?
L = (a i b i | i ! j}?
C -> aCb |!
C -> aCb |!
A -> aA |!
A -> aA | a
B -> Bb |!
B -> bB | b
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